fix: fix #700

fixed by properly converting from a file path and converting to native seperators.
should have known naive handling of file path as a URL would come back to bite us cross platform.

Signed-off-by: Rachel Powers <508861+Ryex@users.noreply.github.com>

launcher/ui/MainWindow.cpp

@@ -1827,7 +1827,7 @@ void MainWindow::processURLs(QList<QUrl> urls)
             break;
         }
 
-        auto localFileName = url.toLocalFile();
+        auto localFileName = QDir::toNativeSeparators(url.toLocalFile()) ;
         QFileInfo localFileInfo(localFileName);
 
         auto type = ResourceUtils::identify(localFileInfo);