Diese Warnung erscheint weil du die App aus dem Internet herunter geladen hast. Solltest du also die App direkt über unsere Internetseite herunter geladen haben ist diese Warnung normal.
To open the app on Windows you can press “More info” in the warning screen and then “Run anyway”.
On macOS, you may need to right-click the app and select “Open” INSTEAD of just double-clicking the app to open. Doing it from the context menu lets you choose “Open” again in the question dialog that appears.