diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/appmanager/AbstractAppManagerFragment.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/appmanager/AbstractAppManagerFragment.java
index 93e4cea0e..43f76324e 100644
--- a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/appmanager/AbstractAppManagerFragment.java
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/appmanager/AbstractAppManagerFragment.java
@@ -437,7 +437,7 @@ public abstract class AbstractAppManagerFragment extends Fragment {
         switch (item.getItemId()) {
             case R.id.appmanager_app_delete_cache:
                 String baseName = selectedApp.getUUID().toString();
-                String[] suffixToDelete = new String[]{mCoordinator.getAppFileExtension(), ".json", "_config.js", "_preset.json", ".png"};
+                String[] suffixToDelete = new String[]{mCoordinator.getAppFileExtension(), ".json", "_config.js", "_preset.json", ".png", "_preview.png"};
                 for (String suffix : suffixToDelete) {
                     File fileToDelete = new File(appCacheDir,baseName + suffix);
                     if (!fileToDelete.delete()) {
diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/qhybrid/FossilFileReader.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/qhybrid/FossilFileReader.java
index e42cb511d..c8ad1bb7b 100644
--- a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/qhybrid/FossilFileReader.java
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/qhybrid/FossilFileReader.java
@@ -82,8 +82,8 @@ public class FossilFileReader {
             buf.order(ByteOrder.LITTLE_ENDIAN);
 
             short handle = buf.getShort();
-            short version = buf.getShort();
-            if ((handle == 5630) && (version == 3 || version == 515 || version == 771)) {
+            byte version = buf.get();
+            if (handle == 5630 && version == 3) {
                 // This is a watch app or watch face
                 isValid = true;
                 isApp = true;