Start the game, when you have to select your profile, click on "Edit" and select the files of the mod on the right-side of the screen...

I also have problems with FPS, but just only in some parts of the Scandinavia area, I think because of high-poly objects. (Medium performant laptop, with game running on mainly medium settings) Anyway try the map with no other mods, maybe that what causes it, or try to start a new game.

I was doing my second job in this amazing map, Kiel - Göteborg, I was driving on the E6 Malmö Ringroad, and at the intersection with E65 my trailer suddenly disapeared, together with the job, as I had it never. I tried it again from an older autosave file but the same bug apears again and again. I u...