Can't launch, replace or uninstall Muse Hub on my macBook

I have Muse Hub on my macBook running Sonoma 14.5, however it will not open or run. I have tried to replace the file in my applications folder with a new download with no success. I also cannot remove the application to try reinstalling it. In both cases, I see a prompt appear saying 'The operation can't be completed because the item "Muse Hub" is in use." and it prevents my action. However, there is no indication in my task manager that the application is running so I can't force quit. I have restarted my Mac, I have checked for updates, I don't know what other options I have to try and fix Muse Hub. Any know issues or fixes you can suggest?

Edit: I also cannot open Musescore 4.3.2 now either. Even after attempting to reinstall it.