@SoullessBog4 Installing MFS through GamePass doesn’t limit you in any way (I installed through a trial GamePass subscription). Granted, the “default” install path can be troublesome in some cases (Community folder buried) but otherwise should work fine. It’s much easier though to select the destination at install time to make the “Community” folder more accessible. Example, I installed MFS directly to my NVMe drive (V: in my case) which I use specifically for MFS and a couple other sim games. I ended up with:
V:\MFS\Official and V:\MFS\Community (this is where all your addons go)