Welcome back. Though not playing for so long the whole ballgame has changed. Get ready to have the newer mods install into their own directories and having several to many builds and startup icons to contend with instead of FLMM. (The mod manager in case you forgot, but other than going retro you can pretty much scratch FLMM anyway) Pretty soon they’re going to have to put out a Freelancer Icon Manager so you can keep track of all the builds! Though you’ll find that the mods have strive to stay on top of the newer technologies take Freelancer to places you can’t imagine. And a goodly portion of those doing it are on this site. Bon Voyage!

Didn’t know about Alt-Enter, I just installed stuff blindly based on recommendations, thanks! I will try and see if it fixes the issue.

Btw the issue happens mostly during the beginning of single player, when the game moves on it happens less