I remember seeing this back when it first got released. The developer himself says it's only created for testing purposes and is never meant to be a replacement app for Ledger hardware wallets. Looking at his GitHub, there haven't been any changes for 7 and more months.

On a different note, I am not sure where the software gets the bitcoin app from. It must communicate with Ledger's servers and get it from there I would believe. If not, what's the source and who has checked it...