diff --git a/core/resources-src/datafiles/openrocket-database b/core/resources-src/datafiles/openrocket-database
index 93054dc2b..48eb2172d 160000
--- a/core/resources-src/datafiles/openrocket-database
+++ b/core/resources-src/datafiles/openrocket-database
@@ -1 +1 @@
-Subproject commit 93054dc2b40d5196433b1d91c636cee2e9dda424
+Subproject commit 48eb2172d58c0db6042bd847a782835df056b287
diff --git a/core/src/main/java/info/openrocket/core/file/configuration/XmlContainerElement.java b/core/src/main/java/info/openrocket/core/file/configuration/XmlContainerElement.java
deleted file mode 100644
index 028408ecb..000000000
--- a/core/src/main/java/info/openrocket/core/file/configuration/XmlContainerElement.java
+++ /dev/null
@@ -1,23 +0,0 @@
-package info.openrocket.core.file.configuration;
-
-import java.util.ArrayList;
-import java.util.List;
-
-public class XmlContainerElement extends XmlElement {
-
-	private final ArrayList<XmlElement> subelements = new ArrayList<XmlElement>();
-
-	public XmlContainerElement(String name) {
-		super(name);
-	}
-
-	public void addElement(XmlElement element) {
-		subelements.add(element);
-	}
-
-	@SuppressWarnings("unchecked")
-	public List<XmlElement> getElements() {
-		return (List<XmlElement>) subelements.clone();
-	}
-
-}
diff --git a/core/src/main/java/info/openrocket/core/file/configuration/XmlContentElement.java b/core/src/main/java/info/openrocket/core/file/configuration/XmlContentElement.java
deleted file mode 100644
index e6651d85c..000000000
--- a/core/src/main/java/info/openrocket/core/file/configuration/XmlContentElement.java
+++ /dev/null
@@ -1,27 +0,0 @@
-package info.openrocket.core.file.configuration;
-
-/**
- * A simple XML element that contains textual content.
- * 
- * @author Sampo Niskanen <sampo.niskanen@iki.fi>
- */
-public class XmlContentElement extends XmlElement {
-
-	private String content = "";
-
-	public XmlContentElement(String name) {
-		super(name);
-	}
-
-	public String getContent() {
-		return content;
-	}
-
-	public void setContent(String content) {
-		if (content == null) {
-			throw new IllegalArgumentException("XML content cannot be null");
-		}
-		this.content = content;
-	}
-
-}
diff --git a/core/src/main/java/info/openrocket/core/file/configuration/XmlElement.java b/core/src/main/java/info/openrocket/core/file/configuration/XmlElement.java
deleted file mode 100644
index 4e9ee189b..000000000
--- a/core/src/main/java/info/openrocket/core/file/configuration/XmlElement.java
+++ /dev/null
@@ -1,43 +0,0 @@
-package info.openrocket.core.file.configuration;
-
-import java.util.HashMap;
-import java.util.Map;
-
-/**
- * A base simple XML element. A simple XML element can contain either other XML
- * elements
- * (XmlContainerElement) or textual content (XmlContentElement), but not both.
- * 
- * @author Sampo Niskanen <sampo.niskanen@iki.fi>
- */
-public abstract class XmlElement {
-
-	private final String name;
-	private final HashMap<String, String> attributes = new HashMap<String, String>();
-
-	public XmlElement(String name) {
-		this.name = name;
-	}
-
-	public String getName() {
-		return name;
-	}
-
-	public void setAttribute(String key, String value) {
-		attributes.put(key, value);
-	}
-
-	public void removeAttribute(String key) {
-		attributes.remove(key);
-	}
-
-	public String getAttribute(String key) {
-		return attributes.get(key);
-	}
-
-	@SuppressWarnings("unchecked")
-	public Map<String, String> getAttributes() {
-		return (Map<String, String>) attributes.clone();
-	}
-
-}
diff --git a/core/src/main/java/info/openrocket/core/simulation/FlightDataType.java b/core/src/main/java/info/openrocket/core/simulation/FlightDataType.java
index ca15d8f98..df34e4718 100644
--- a/core/src/main/java/info/openrocket/core/simulation/FlightDataType.java
+++ b/core/src/main/java/info/openrocket/core/simulation/FlightDataType.java
@@ -392,14 +392,14 @@ public class FlightDataType implements Comparable<FlightDataType> {
 			// if something has changed, then we need to remove the old one
 			// otherwise, just return what we found
 			if (!u.equals(type.getUnitGroup())) {
-				oldPriority = type.groupPriority;
+				oldPriority = type.priority;
 				EXISTING_TYPES.remove(type);
 				log.info("Unitgroup of type " + type.getName() +
 						", has changed from " + type.getUnitGroup().toString() +
 						" to " + u.toString() +
 						". Removing old version.");
 			} else if (!s.equals(type.getName())) {
-				oldPriority = type.groupPriority;
+				oldPriority = type.priority;
 				EXISTING_TYPES.remove(type);
 				log.info("Name of type " + type.getName() + ", has changed to " + s + ". Removing old version.");
 			} else {
@@ -459,7 +459,7 @@ public class FlightDataType implements Comparable<FlightDataType> {
 	private final String symbol;
 	private final UnitGroup units;
 	private final FlightDataTypeGroup group;
-	private final int groupPriority;
+	private final int priority;
 	private final int hashCode;
 
 	private FlightDataType(String typeName, String symbol, UnitGroup units, FlightDataTypeGroup group, int priority) {
@@ -471,7 +471,7 @@ public class FlightDataType implements Comparable<FlightDataType> {
 		this.symbol = symbol;
 		this.units = units;
 		this.group = group;
-		this.groupPriority = priority;
+		this.priority = priority;
 		this.hashCode = this.name.toLowerCase(Locale.ENGLISH).hashCode();
 	}
 
@@ -492,7 +492,7 @@ public class FlightDataType implements Comparable<FlightDataType> {
 	}
 
 	public int getGroupPriority() {
-		return groupPriority;
+		return group.getPriority();
 	}
 
 	@Override
@@ -501,10 +501,10 @@ public class FlightDataType implements Comparable<FlightDataType> {
 	}
 
 	@Override
-	public boolean equals(Object other) {
-		if (!(other instanceof FlightDataType))
+	public boolean equals(Object o) {
+		if (!(o instanceof FlightDataType))
 			return false;
-		return this.name.equalsIgnoreCase(((FlightDataType) other).name);
+		return this.compareTo((FlightDataType) o) == 0;
 	}
 
 	@Override
@@ -514,8 +514,11 @@ public class FlightDataType implements Comparable<FlightDataType> {
 
 	@Override
 	public int compareTo(FlightDataType o) {
-		if (this.groupPriority != o.groupPriority)
-			return this.groupPriority - o.groupPriority;
-		return this.name.compareToIgnoreCase(o.name);
+		final int groupCompare = this.getGroup().compareTo(o.getGroup());
+		if (groupCompare != 0) {
+			return groupCompare;
+		}
+		
+		return this.priority - o.priority;
 	}
 }
diff --git a/core/src/main/java/info/openrocket/core/simulation/FlightDataTypeGroup.java b/core/src/main/java/info/openrocket/core/simulation/FlightDataTypeGroup.java
index f0a1fcf81..2db1af4eb 100644
--- a/core/src/main/java/info/openrocket/core/simulation/FlightDataTypeGroup.java
+++ b/core/src/main/java/info/openrocket/core/simulation/FlightDataTypeGroup.java
@@ -3,7 +3,7 @@ package info.openrocket.core.simulation;
 import info.openrocket.core.l10n.Translator;
 import info.openrocket.core.startup.Application;
 
-public class FlightDataTypeGroup {
+public class FlightDataTypeGroup implements Comparable<FlightDataTypeGroup> {
 	private static final Translator trans = Application.getTranslator();
 
 	public static final FlightDataTypeGroup TIME = new FlightDataTypeGroup(trans.get("FlightDataTypeGroup.GROUP_TIME"), 0);
@@ -56,4 +56,16 @@ public class FlightDataTypeGroup {
 	public String toString() {
 		return getName();
 	}
+
+	@Override
+	public boolean equals(Object o) {
+		if (!(o instanceof FlightDataTypeGroup))
+			return false;
+		return this.compareTo((FlightDataTypeGroup) o) == 0;
+	}
+
+	@Override
+	public int compareTo(FlightDataTypeGroup o) {
+		return this.priority  - o.priority;
+	}
 }
diff --git a/core/src/main/java/module-info.java b/core/src/main/java/module-info.java
index 459e2c626..d2a8c328f 100644
--- a/core/src/main/java/module-info.java
+++ b/core/src/main/java/module-info.java
@@ -40,7 +40,6 @@ open module info.openrocket.core {
 	exports info.openrocket.core.document.attachments;
 	exports info.openrocket.core.document.events;
 	exports info.openrocket.core.file;
-	exports info.openrocket.core.file.configuration;
 	exports info.openrocket.core.file.iterator;
 	exports info.openrocket.core.file.motor;
 	exports info.openrocket.core.file.openrocket;
@@ -106,4 +105,4 @@ open module info.openrocket.core {
 			info.openrocket.core.optimization.services.DefaultOptimizableParameterService;
 	provides info.openrocket.core.optimization.services.SimulationModifierService with
 			info.openrocket.core.optimization.services.DefaultSimulationModifierService;
-}
\ No newline at end of file
+}
diff --git a/core/src/main/resources/datafiles/examples/Presets.ork b/core/src/main/resources/datafiles/examples/Presets.ork
deleted file mode 100644
index 05407929f..000000000
Binary files a/core/src/main/resources/datafiles/examples/Presets.ork and /dev/null differ
diff --git a/core/src/main/resources/datafiles/thrustcurves/thrustcurves.ser b/core/src/main/resources/datafiles/thrustcurves/thrustcurves.ser
index 0819a2305..5a6859372 100644
Binary files a/core/src/main/resources/datafiles/thrustcurves/thrustcurves.ser and b/core/src/main/resources/datafiles/thrustcurves/thrustcurves.ser differ
diff --git a/core/src/main/resources/l10n/messages.properties b/core/src/main/resources/l10n/messages.properties
index 9e962b368..cc5be690d 100644
--- a/core/src/main/resources/l10n/messages.properties
+++ b/core/src/main/resources/l10n/messages.properties
@@ -343,8 +343,8 @@ pref.dlg.RockSimfiles = RockSim engine files (*.rse)
 pref.dlg.ZIParchives = ZIP archives (*.zip)
 pref.dlg.checkbox.Checkupdates = Always check for software updates at startup
 pref.dlg.checkbox.Checkupdates.ttip = Check for software updates every time you start up OpenRocket
-pref.dlg.checkbox.CheckBetaupdates = Also check for beta releases
-pref.dlg.checkbox.CheckBetaupdates.ttip = If checked, beta release updates are also notified. If unchecked, only official releases are considered.
+pref.dlg.checkbox.CheckBetaupdates = Also check for pre-releases
+pref.dlg.checkbox.CheckBetaupdates.ttip = If checked, pre-release (e.g. beta releases) updates are also notified. If unchecked, only official releases are considered.
 pref.dlg.ttip.Checkupdatesnow = Check for software updates now
 pref.dlg.lbl.Selectprefunits = Select your preferred units:
 pref.dlg.lbl.Rocketinfofontsize = Size of text in rocket design panel: 
@@ -493,13 +493,13 @@ simedtdlg.lbl.Length = Length:
 simedtdlg.lbl.ttip.Length = The length of the launch rod.
 simedtdlg.checkbox.Intowind = Always launch directly up-wind or down-wind
 simedtdlg.checkbox.ttip.Intowind1 = <html>Makes the launch rod point into the wind.<br> 
-simedtdlg.checkbox.ttip.Intowind2 = A zero launchrod angle will point directly up. <br>
-simedtdlg.checkbox.ttip.Intowind3 = A negative launchrod angle will launch with the wind.<br>If you uncheck this box you can point the launchrod any direction you please.
+simedtdlg.checkbox.ttip.Intowind2 = A zero launch rod angle will point directly up (vertical). <br>
+simedtdlg.checkbox.ttip.Intowind3 = A negative launch rod angle will launch with the wind.<br>
 simedtdlg.checkbox.ttip.Intowind4 = If you uncheck this box you can point the launchrod any direction you please.
 simedtdlg.lbl.Angle = Angle:
-simedtdlg.lbl.ttip.Angle = <html>The angle of the launch rod from vertical.<br> Positive angles point North of launch.
+simedtdlg.lbl.ttip.Angle = <html>The angle of the launch rod from vertical.<br> If set to always launch up-wind or down-wind, positive angles are up-wind, negative angles down-wind.<br> If set for a manual direction, positive angles towards the direction axis.<br> E.g. if direction is set to 90° (East of the wind), positive angles will point the launch rod East. Negative angles will point the rod West.
 simedtdlg.lbl.Direction = Direction:
-simedtdlg.lbl.ttip.Direction1 = <html>Direction of the launch rod relative to the wind.<br>
+simedtdlg.lbl.ttip.Direction1 = <html>Direction of the launch rod relative to the wind direction.<br> E.g. 90° is East of the wind direction. <br>
 simedtdlg.lbl.ttip.Direction2 =  -
 simedtdlg.lbl.ttip.Direction3 =  0 is North.
 simedtdlg.border.Simopt = Simulator options
diff --git a/swing/src/main/java/info/openrocket/swing/gui/dialogs/preferences/DesignPreferencesPanel.java b/swing/src/main/java/info/openrocket/swing/gui/dialogs/preferences/DesignPreferencesPanel.java
index 918e821a9..4f4d0eea8 100644
--- a/swing/src/main/java/info/openrocket/swing/gui/dialogs/preferences/DesignPreferencesPanel.java
+++ b/swing/src/main/java/info/openrocket/swing/gui/dialogs/preferences/DesignPreferencesPanel.java
@@ -76,19 +76,6 @@ public class DesignPreferencesPanel extends PreferencesPanel {
 		spin.setEditor(new SpinnerEditor(spin));
 		this.add(spin, "wrap");
 
-		final JCheckBox autoOpenDesignFile = new JCheckBox(
-				trans.get("pref.dlg.but.openlast"));
-		autoOpenDesignFile.setSelected(preferences
-				.isAutoOpenLastDesignOnStartupEnabled());
-		autoOpenDesignFile.addActionListener(new ActionListener() {
-			@Override
-			public void actionPerformed(ActionEvent e) {
-				preferences.setAutoOpenLastDesignOnStartup(autoOpenDesignFile
-						.isSelected());
-			}
-		});
-		this.add(autoOpenDesignFile, "wrap, growx, span 2");
-
 		// // Always open leftmost tab when opening a component edit dialog
 		final JCheckBox alwaysOpenLeftmostTab = new JCheckBox(
 				trans.get("pref.dlg.checkbox.AlwaysOpenLeftmost"));
diff --git a/swing/src/main/java/info/openrocket/swing/gui/main/ExampleDesignFileAction.java b/swing/src/main/java/info/openrocket/swing/gui/main/ExampleDesignFileAction.java
index 09def07fc..565a1d83e 100644
--- a/swing/src/main/java/info/openrocket/swing/gui/main/ExampleDesignFileAction.java
+++ b/swing/src/main/java/info/openrocket/swing/gui/main/ExampleDesignFileAction.java
@@ -46,7 +46,6 @@ public final class ExampleDesignFileAction extends JMenu {
         "Pods--powered with recovery deployment",
         null,
         // Examples demonstrating customized functionality
-        "Presets",
         "Simulation extensions",
         "Simulation scripting"
     };
diff --git a/swing/src/main/java/info/openrocket/swing/gui/simulation/SimulationExportPanel.java b/swing/src/main/java/info/openrocket/swing/gui/simulation/SimulationExportPanel.java
index 9522e24fc..ad8c156c0 100644
--- a/swing/src/main/java/info/openrocket/swing/gui/simulation/SimulationExportPanel.java
+++ b/swing/src/main/java/info/openrocket/swing/gui/simulation/SimulationExportPanel.java
@@ -89,7 +89,7 @@ public class SimulationExportPanel extends JPanel {
 		branch = data.getBranch(0);
 		
 		types = branch.getTypes();
-				
+		
 		selected = new boolean[types.length];
 		units = new Unit[types.length];
 		for (int i = 0; i < types.length; i++) {