I did a reset of my password manually. Start one Affinty App, in the Dialog to enter your ID, i clicked "forgot my Password" an set a Passphrase easy to remember instead of usung automatic feature by the Mac
Started one app in Trail Mode, hit at the upper right of the App the button to connect my App with affinty.serif.com used my new password and Bingo.
My new password was not in the Password Safe of my Mac jet. To do so I triggered at the affinty.serif.com Site a Password change, and used my remembered password phrase again
The password Safe of the Mac discovered two affinity sites, affinity.store and store.serif.com