I was able to go with this Mi Fit mod (Google Drive - Virus scan warning) then went to Profile, Settings, about, Exercising user rights, revoke authorization (I logged in with the IM account that had already logged in with the band), then I signed in with another account (another one I had...
Capture says to reset to mi band factory settings, so far only need to format mi band, but that's the problem. mi band4 is stuck to a screen (the same as the capture screen) there is no way to see the time, menu, or reset to factory settings. and Mi Fit (currently) does not match mi Band (this...