Reinstalling Beta

M1 MacBook Air. Macos Beta 11.3 installed OTA last night and tons of problems: no sound, non-responsive apps, etc.

How do I either roll back to 11.2 or reinstall 11.3? And where on the dev site do I find these downloads.

Thanks for any help.
[Posting this after trying to delete my original posting. Didn't realize forum software won't let you delete your own post after 15 minutes.]

I went back to the 11 RC version, then upgraded to 11.2 beta, then re-downloaded 11.3 beta and it now works beautifully. For some unknown reason, I seem to have originally downloaded less than the entire file.
Reinstalling Beta
 
 
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