diff --git a/src/main/java/com/github/sannies/isoviewer/FileOpenEventHandler.java b/src/main/java/com/github/sannies/isoviewer/FileOpenEventHandler.java
index b188260..2e05129 100644
--- a/src/main/java/com/github/sannies/isoviewer/FileOpenEventHandler.java
+++ b/src/main/java/com/github/sannies/isoviewer/FileOpenEventHandler.java
@@ -25,9 +25,9 @@
 import java.io.IOException;
 
 public class FileOpenEventHandler implements EventHandler<ActionEvent> {
-    FileChooser fileChooser = new FileChooser();
     Stage stage;
     IsoViewerFx isoViewerFx;
+    File currentDir;
 
     public FileOpenEventHandler(Stage stage, IsoViewerFx isoViewerFx) {
         this.stage = stage;
@@ -38,16 +38,27 @@ public FileOpenEventHandler(Stage stage, IsoViewerFx isoViewerFx) {
     public void handle(ActionEvent event) {
 
 
-//Set extension filter
+        FileChooser fileChooser = new FileChooser();
         fileChooser.getExtensionFilters().addAll(
                 new FileChooser.ExtensionFilter("MP4 files", "*.mp4", "*.uvu", "*.m4v", "*.m4a", "*.uva", "*.uvv", "*.uvt"),
                 new FileChooser.ExtensionFilter("All files", "*.*"));
 
-//Show open file dialog
+        //Open directory from existing directory
+        if(currentDir != null){
+            fileChooser.setInitialDirectory(currentDir);
+        }
+
+        //Set extension filter
+        FileChooser.ExtensionFilter extFilter = new FileChooser.ExtensionFilter("AVI files (*.avi)", "*.avi");
+        fileChooser.getExtensionFilters().add(extFilter);
+
+        //Show open file dialog
         File file = fileChooser.showOpenDialog(stage);
+
         if (file != null) {
             stage.setTitle(file.getPath());
             try {
+                currentDir = file.getParentFile();
                 isoViewerFx.openFile(file);
 
             } catch (IOException e) {
diff --git a/src/main/java/com/github/sannies/isoviewer/IsoViewerFx.java b/src/main/java/com/github/sannies/isoviewer/IsoViewerFx.java
index 3d9f3ae..40f785a 100644
--- a/src/main/java/com/github/sannies/isoviewer/IsoViewerFx.java
+++ b/src/main/java/com/github/sannies/isoviewer/IsoViewerFx.java
@@ -63,7 +63,7 @@ public class IsoViewerFx extends Application {
     public void openFile(File f) throws IOException {
         IsoFile isoFile = new IsoFile(f.getAbsolutePath());
         stage.setTitle(f.getAbsolutePath());
-        userPrefs.put("openedFile", f.getAbsolutePath());
+
         boxesOrTracksTabPane.getTabs().clear();
         boxesOrTracksTabPane.getTabs().add(createBoxAndDetailTab(isoFile));
 
@@ -82,6 +82,7 @@ public void openFile(File f) throws IOException {
             }
 
         }
+        userPrefs.put("openedFile", f.getAbsolutePath());
     }
 
     @Override
@@ -141,7 +142,7 @@ Tab createTrackTab(Track track) {
 
 
         ListView<Sample> left = new ListView<Sample>(FXCollections.observableList(track.getSamples()));
-        final AvcConfigurationBox avcC = Path.getPath(track.getSampleDescriptionBox(), "avc1[0]/avcC[0]");
+        final AvcConfigurationBox avcC = Path.getPath(track.getSampleDescriptionBox(), "avc.[0]/avcC[0]");
         if (avcC == null) {
             left.setCellFactory(new SampleRenderCallback());
         } else {
@@ -214,6 +215,8 @@ public void loadPosAndSize() {
         if (new File(openFile).exists()) {
             try {
                 openFile(new File(openFile));
+            } catch (RuntimeException e) {
+                e.printStackTrace();
             } catch (IOException e) {
                 e.printStackTrace();
             }