Hi! I’m sorry to hear your Moises desktop app opened but won’t let you play songs from your library after the upgrade. Let’s try to get this sorted out for you.

Just to clarify:
- Is the app opening correctly and you can navigate your library, but playback just doesn’t start?
- Are you seeing any error messages or just silent failure when you try to play a song?
- Did you update the app through an official source like the Moises website or Microsoft Store?
- Have you tried logging out of the app and logging back in since the upgrade?

Meanwhile, let me guide you through some simple troubleshooting steps that usually help in such cases:

1. Check for Updates: Even after an upgrade, sometimes incremental fixes are released. Open the Moises app and check if there is a newer update to install.

2. Logout and Login Again: Sign out of your Moises account in the desktop app, close it completely, then reopen and sign back in. This can refresh your session and library access.

3. Clear App Cache (if applicable): Sometimes leftover cache or temporary data from a previous version causes issues. You can clear cache by going to the app settings or, if not available, consider reinstalling the app after uninstalling it.

4. Reinstall the App: Uninstall Moises, restart your computer, then download and install the latest version afresh from the official site.

5. Internet Connection: Make sure you have a stable internet connection since library playback often requires verification and streaming.

If these steps don’t help or you encounter any error messages, please let me know what exactly you see. That way, we can dig deeper.

Also for your convenience, here is Moises’ official troubleshooting guide for songs not playing: https://help.moises.ai/hc/en-us/articles/8631861606684-My-songs-are-not-playing-What-can-I-do [1]

Let me know how these steps go or if you need help with any of them!