Upgrade problems

I'm not entirely sure which upgrade caused these two problems, because I seldom alter my set up.

1. I generally use a set of Bluetooth headphones but unless I have them on and active I cannot get any playback. Output from my speaker seems to have ceased and I have tried different options in preferences and restarting the Audio devices. The play button goes Blue and active but the music doesnt play and the bar stays static that would normally move along with the current note.
2. Clicking a Musescore (mscz) file opens a second copy of Musescore with a pop up window stating that the previous version had unexpectidly quit and an option to restore my files. Sometimes this works sometimes not. Often I can have two or three active sessions of Musescore. If I open from the file menu it is fine.

I have removed Musescore and reinstalled, but it did seem to keep a certain amount of preferences.

I am now running OS: Windows 10 (10.0), Arch.: x86_64, MuseScore version (64-bit): 3.4.0.9562, revision: 716655c

Last installation I tried the Beta Version
Anyone else have similar problems