I don't mind it affecting the Steam status, but it tries to open the Steam overlay ingame, and that seems to cause crashes on alt-tab for me (turning off steam before launching FAF fixes this).

The crash specifically is due to the dx9 device being "lost".

I've updated all my drivers, which I thought fixed the issue, yesterday, but it's now reoccurred.

How do I fix those permissions?

I've set Full Permissions for the exe and every folder above it for all users, but the same error occurs.

I know I can fix this by starting as admin, but I'm trying to avoid that annoying pop-up every time I launch.

(I've deleted everything and done a clean install since the last time I started as admin.)

Edit:

Worked out a solution:

Create a new ProgramData folder in a different drive, set FAF to use that one.

I don't mind it affecting the Steam status, but it tries to open the Steam overlay ingame, and that seems to cause crashes on alt-tab for me (turning off steam before launching FAF fixes this).

The crash specifically is due to the dx9 device being "lost".

I've updated all my drivers, which I thought fixed the issue, yesterday, but it's now reoccurred.