Fix configuration check

src/App.js

@@ -465,7 +465,7 @@ class App extends Component {
     const allowMount = this.state.RepertoryVersion !== 'none';
     const missingDependencies = (this.state.MissingDependencies.length > 0);
     const allowConfig = this.state.LocationsLookup[selectedVersion] &&
-      !this.state.LocationsLookup[selectedVersion].config_allowed;
+      this.state.LocationsLookup[selectedVersion].config_allowed;
 
     const showDependencies = missingDependencies &&
       !this.state.DownloadActive;