diff --git a/swing/src/net/sf/openrocket/gui/dialogs/preferences/PreferencesDialog.java b/swing/src/net/sf/openrocket/gui/dialogs/preferences/PreferencesDialog.java
index 3a0ef3534..6a438e3d2 100644
--- a/swing/src/net/sf/openrocket/gui/dialogs/preferences/PreferencesDialog.java
+++ b/swing/src/net/sf/openrocket/gui/dialogs/preferences/PreferencesDialog.java
@@ -28,7 +28,6 @@ public class PreferencesDialog extends JDialog {
 	private static final Logger log = LoggerFactory
 			.getLogger(PreferencesDialog.class);
 
-	private File defaultDirectory = null;
 	private static final Translator trans = Application.getTranslator();
 
 	private final SwingPreferences preferences = (SwingPreferences) Application
diff --git a/swing/src/net/sf/openrocket/gui/dialogs/preferences/SimulationPreferencesPanel.java b/swing/src/net/sf/openrocket/gui/dialogs/preferences/SimulationPreferencesPanel.java
index 8e6e9eb8a..92bb729b3 100644
--- a/swing/src/net/sf/openrocket/gui/dialogs/preferences/SimulationPreferencesPanel.java
+++ b/swing/src/net/sf/openrocket/gui/dialogs/preferences/SimulationPreferencesPanel.java
@@ -32,7 +32,7 @@ public class SimulationPreferencesPanel extends PreferencesPanel {
 
 
 	public SimulationPreferencesPanel() {
-		super(new MigLayout("fill"));
+		super(new MigLayout("fillx"));
 
 		// Confirm deletion of simulations:
 		final JCheckBox confirmDelete = new JCheckBox(
@@ -74,7 +74,7 @@ public class SimulationPreferencesPanel extends PreferencesPanel {
 		// // Simulator options
 		sub.setBorder(BorderFactory.createTitledBorder(trans
 				.get("simedtdlg.border.Simopt")));
-		this.add(sub, "growx, growy, aligny 0");
+		this.add(sub, "grow, aligny 0, gaptop 40lp");
 
 		// Separate panel for computation methods, as they use a different
 		// layout