Mine stopped during the conversion process. Restarted my machine and did the verify files check, and that got it going again.
Haven't seen a changelog, but it was really cheap for existing XP11 owners. If that means anything?
The coastlines have the 3D water now, and it's a new overlay. Can still see some 2D trees though.
I would guess they've added the new custom buildings from the MSFS version too.