Now I can only get the game running by directly launching the Arma3.exe (without the launcher), however, I does not load the mods this way and therefore I can't enjoy the game. This is where my problems started, CUP Terrains - Maps showed me some sort of error message so I disabled, then deleted it and later on I also deleted CUP Terrains - Core. I had the other CUP mods running before that with a bunch of other mods such as Exile, HLC weapon mods, a few gear and vehicle mods and so on. The game used to work fine (with plenty of mods enabled) 2 days ago, then I downloaded CUP Terrains - Core and CUP Terrains - Maps. I checked my processes via TaskManager and there the arma3.exe as well as the arma3battleeye.exe show up but they don't do anything. but the game doesn't start like it used to.
It says it's starting BattleEye and loading mods/addons etc.
I have the following problem: the arma3.exe does not launch/open properly anymore when I click on 'Play' in the official Arma 3 launcher.