Don't try and open a project if it doesn't exist

src/main/java/sh/ball/gui/Gui.java

@@ -116,6 +116,7 @@ public class Gui extends Application {
     projectSelectController.setApplicationLauncher((path, muted) -> launchMainApplication(controller, path, muted));
 
     controller.setAddRecentFile(projectSelectController::addRecentFile);
+    controller.setRemoveRecentFile(projectSelectController::removeRecentFile);
     controller.setRecentFiles(projectSelectController::recentFiles);
 
     controller.setSoftwareOscilloscopeAction(() -> {

src/main/java/sh/ball/gui/controller/MainController.java

@@ -81,6 +81,7 @@ public class MainController implements Initializable, FrequencyListener, MidiLis
   private static final long MAX_RECENT_FILES = 15;
 
   private Consumer<String> addRecentFile;
+  private Consumer<String> removeRecentFile;
   private String openProjectPath;
   private final FileChooser wavFileChooser = new FileChooser();
 
@@ -1238,7 +1239,15 @@ public class MainController implements Initializable, FrequencyListener, MidiLis
       documentFactory.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, true);
       DocumentBuilder documentBuilder = documentFactory.newDocumentBuilder();
 
-      Document document = documentBuilder.parse(new File(projectFileName));
+      Document document;
+      try {
+        document = documentBuilder.parse(new File(projectFileName));
+      } catch (Exception e) {
+        logger.log(Level.WARNING, e.getMessage(), e);
+        removeRecentFile.accept(projectFileName);
+        openProject(null);
+        return;
+      }
       document.getDocumentElement().normalize();
 
       List<BooleanProperty> micSelected = micSelected();
@@ -1473,6 +1482,10 @@ public class MainController implements Initializable, FrequencyListener, MidiLis
     this.addRecentFile = addRecentFile;
   }
 
+  public void setRemoveRecentFile(Consumer<String> removeRecentFile) {
+    this.removeRecentFile = removeRecentFile;
+  }
+
   public void setVolume(double volume) {
     effectsController.setVolume(volume);
   }

src/main/java/sh/ball/gui/controller/ProjectSelectController.java

@@ -72,6 +72,10 @@ public class ProjectSelectController implements Initializable {
       try {
         String selectedItem = recentFilesListView.getSelectionModel().getSelectedItem();
         if (selectedItem != null) {
+          if (!new File(selectedItem).exists()) {
+            removeRecentFile(selectedItem);
+            return;
+          }
           launchMainApplication.accept(selectedItem, startMutedCheckBox.isSelected());
         }
       } catch (Exception ex) {
@@ -176,4 +180,9 @@ public class ProjectSelectController implements Initializable {
   public void setOpenBrowser(Consumer<String> openBrowser) {
     this.openBrowser = openBrowser;
   }
+
+  public void removeRecentFile(String path) {
+    recentFiles.remove(path);
+    resetRecentFiles();
+  }
 }