How to remove all multipass installations on windows 10, hidden files of installation, downloaded images?

I changed 1gb ram in hyper-v to flexible ram and its not working anymore- blue screen shows starting and closes. Sometimes even not showing starting primary- just blue screen after some time closing
Not opening after 5-10 minutes closes

Each time i removed multipass, restarted and reinstalled it kept somewhere downloaded image somewhere hidded i think because i get smaller size of disk after each time not the same free space.
How to remove all and reset all settings?
Also uninstall not working anymore after few reinstalls- stuck

Hi @Kangarooo, I have replied to you on Github here.