don't overwrite the plugins directory: remove the applicationDir and add the pluginPaths

Index: src/run/main.cpp
--- src/run/main.cpp.orig
+++ src/run/main.cpp
@@ -285,7 +285,11 @@ int main(int argc, char *argv[]) {
         qWarning() << "No plugin paths found";
         return -1;
     }
-    app->setLibraryPaths(pluginPaths);
+
+    app->removeLibraryPath(app->applicationDirPath());
+    foreach (const QString &path, pluginPaths)
+       app->addLibraryPath(path);
+
 
     // make sure basic entities are initialized before loading plugins:
     RDimStyleData::initDefaults();