diff --git a/DroidFish/src/org/petero/droidfish/DroidFish.java b/DroidFish/src/org/petero/droidfish/DroidFish.java
index acd9ef0..0ef73b1 100644
--- a/DroidFish/src/org/petero/droidfish/DroidFish.java
+++ b/DroidFish/src/org/petero/droidfish/DroidFish.java
@@ -825,6 +825,12 @@ public class DroidFish extends Activity implements GUIInterface {
                 return true;
             }
         });
+        thinking.setOnClickListener(new OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                openOptionsMenu();
+            }
+        });
 
         custom1Button = (ImageButton)findViewById(R.id.custom1Button);
         custom1ButtonActions.setImageButton(custom1Button, this);
diff --git a/DroidFish/src/org/petero/droidfish/engine/ExternalEngine.java b/DroidFish/src/org/petero/droidfish/engine/ExternalEngine.java
index a1e693a..2235abd 100644
--- a/DroidFish/src/org/petero/droidfish/engine/ExternalEngine.java
+++ b/DroidFish/src/org/petero/droidfish/engine/ExternalEngine.java
@@ -36,8 +36,6 @@ public class ExternalEngine extends UCIEngineBase {
     protected final Context context;
 
     private File engineFileName;
-    protected static final String intSfPath = "/data/data/org.petero.droidfish/internal_sf";
-    private static final String exePath = "/data/data/org.petero.droidfish/engine.exe";
     private final Report report;
     private Process engineProc;
     private Thread startupThread;
@@ -62,10 +60,15 @@ public class ExternalEngine extends UCIEngineBase {
         isRunning = false;
     }
 
+    protected String internalSFPath() {
+        return context.getFilesDir().getAbsolutePath() + "/internal_sf";
+    }
+
     /** @inheritDoc */
     @Override
     protected void startProcess() {
         try {
+            String exePath = context.getFilesDir().getAbsolutePath() + "/engine.exe";
             copyFile(engineFileName, new File(exePath));
             chmod(exePath);
             ProcessBuilder pb = new ProcessBuilder(exePath);
@@ -256,7 +259,7 @@ public class ExternalEngine extends UCIEngineBase {
     }
 
     protected void copyFile(File from, File to) throws IOException {
-        new File(intSfPath).delete();
+        new File(internalSFPath()).delete();
         if (to.exists() && (from.length() == to.length()) && (from.lastModified() == to.lastModified()))
             return;
         if (to.exists())
diff --git a/DroidFish/src/org/petero/droidfish/engine/InternalStockFish.java b/DroidFish/src/org/petero/droidfish/engine/InternalStockFish.java
index c3a381e..59b5c3f 100644
--- a/DroidFish/src/org/petero/droidfish/engine/InternalStockFish.java
+++ b/DroidFish/src/org/petero/droidfish/engine/InternalStockFish.java
@@ -105,7 +105,7 @@ public class InternalStockFish extends ExternalEngine {
 
         // The checksum test is to avoid writing to /data unless necessary,
         // on the assumption that it will reduce memory wear.
-        long oldCSum = readCheckSum(new File(intSfPath));
+        long oldCSum = readCheckSum(new File(internalSFPath()));
         long newCSum = computeAssetsCheckSum(sfExe);
         if (oldCSum == newCSum)
             return;
@@ -132,6 +132,6 @@ public class InternalStockFish extends ExternalEngine {
             if (os != null) try { os.close(); } catch (IOException ex) {}
         }
 
-        writeCheckSum(new File(intSfPath), newCSum);
+        writeCheckSum(new File(internalSFPath()), newCSum);
     }
 }