AdGuard for Windows v6.1.252.1283 fails to auto-update

Adguard for Windows v6.1.252.1283 notified me of a new version, downloaded it and has been stuck on "Starting Update ..." ever since. Restarting Windows and restarting Adguard didn't resolve this, it always gets stuck on "Starting Update ...".

I'll manually update, but it's probably worth looking into making the updater more robust and allow it to notice if/when it has failed.