Additional features, settings, or issues not covered by specific Microsoft Teams Free categories
Thanks for your answer,
unfortunately, my AppData\Roaming\Microsoft folder does not contain a folder called "Teams", only one called "msteams", and deleting that one did not prompt me to sign in again upon starting Teams, so apparently it is not the same kind of folder.
Also, as mentioned in my original post, the General settings tab in my Teams application does not contain most of the elements that should be there.