OK, quick update. I did several things yesterday and I THINK that I´m able to store my configurations now, maybe this can help you guys:
- Updated XBOX app
- Followed the instructions on this post: UI broken and reset user settings - Gaming Services update - #159 by TenPatrol
- Rebooted the PC
- Started the sim, got the same “unable to sync”
- Pressed “try again” about 3 times (or until it no longer appears)
- The sim finally started.
- Closed the sim and restarted it
- Did not received the “unable to sync” message, configured the graphics and controller settings and apparenty they are now being stored.
As fas as I saw, my flight history was NOT there, and that is not a big deal for me. I know that there are plenty of users that do not want to lose that history, and therefore this might not be useful, but if you don´t really need that, then this might help to get a usable sim again.