Press Windows + R
type "regedit" and press enter
Go to HKEY_CURRENT_USER\SOFTWARE\osu!
https://www.uuidgenerator.net/version1 in this page, generate a UUID Version 4 code
Go back to regedit, paste it on UninstallID
Enjoy!
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It works for me, I can switch between lots of accounts (it also bypasses the auto restriction after submitting first play)
Let me know if it worked for you!!