This follows on from two questions I posted earlier - which I can't find again.

I hoped that by removing Thunderbird and then installing it again, I could set it up so that it continued to work without, as it did last time, seeming to be fine then saying the password didn't match the server (which wasn't the one I'd used). But Thunderbird remembered everything so re-installing didn't help. But I tried using the app password I'd generated for the last attempt - and that worked. It remains to be seem if it will when I open Thunderbird again . . .