I’m glad you’ve got it sorted. Several times I’ve felt that I’m bashing my head against a brick wall with this sim, but it works out alright in the end. In this case it looks like a setting was changed somewhere (FS2020 does this at times), and you found the right route to reset it correctly.
As you’ve found the solution and it is likely others will have the same problem, it would be good to mark your post as “The Solution” in the topic.
Happy flying!