Partially fixed #33.

src/gui/formmain.cpp

@@ -248,6 +248,7 @@ void FormMain::onAboutToQuit() {
 
     // We locked the lock to exit peacefully, unlock it to avoid warnings.
     SystemFactory::instance()->applicationCloseLock()->unlock();
+    QtSingleApplication::instance()->unlock();
   }
   else {
     // Request for write lock timed-out. This means

src/qtsingleapplication/qtlocalpeer.h

@@ -62,7 +62,9 @@ public:
 
     // Unlocks the file.
     bool unlock() {
-      return lockFile.unlock();
+      bool unlocked = lockFile.unlock();
+      lockFile.remove();
+      return unlocked;
     }
 
   Q_SIGNALS: