I've been under the weather for the past few days., so I took today and Friday off from work. I initially uninstalled P3D v2.4 and left all the folders in the original locations. Installed and activated V2.5 with no issues.
On starting P3D v2.5 you get a lot of Orbx Object flow errors, so I went into the file that controls those and disabled them. I figure when they releas updates, then I'll update them. Not worried about Object Flow at the moment.
I haven't been able to verify what was affected outside of my Orbyx areas (i.e. scenery textures, mesh, etc.) but it's all still listed in the World Scenery Library. I would suggest backing up your scenery.cfg and terrain.cfg files before loading P3D v2.5. Those are the files that really affect the scenery.
So far my MM scenery and Orbyx scenery shows up perfectly. My only issue is the Tongass region. Re-installing did not help. Will keep playing with it.
Instant Scenery doesn't work. I know there will be an update for that! OPUS FSI weather still works as well as REX. That's it so far. Crisper colors and beter frame rates so far.
****Update**** Orbx is messed up as well. Might be able to determine the cause. Will report back.