I'm not sure if your issues are similar. Have a look at this thread: http://prepar3d.com/forum/viewtopic.php?f=6322&t=11379 You could also have a look at this in relation to manually editing the scenery.cfg - may be cumbersome if you have a lot of addon scenery https://prepar3d.com/forum/viewto...

I'm having the exact same issue as Machie. I've uninstalled the v3.0 client, and then installed the v3.1 client.msi. Per official install update instruction. Unfortunately, it seems now that the scenery.cfg got corrupted in the process, and now P3D will abort startup after clicking away numerous sce...