Hi Marcel,
thanks for checking again. I tried several build configurations and started the game outside and from within Steam, but the overlay won’t load. I also cannot see the respective process you mentioned.
Before digging further into this, I will heed your advice and check our Facepunch.Steamworks. It seems fairly high-level, maybe I can get it to run. As soon as I get to it, I will let you know.
Best and thanks again for your effort,
Max