Hey, Ottelo. This map was uploaded many years ago. So the Synergy workshop upload system may have changed significantly during these past few years. That may explain why you have difficulty in finding the option "Map/Mod" Item Type settings.

I made this map when I had very little knowledge in Hammer and Source engine, and the Steam Workshop system in general. I now have much more experience in it, albeit not expert by no means. I'm sure you will be able to find the answer on your own.

Thanks for bringing me back memories on this, I still have fond memories on it. It was my first ever project.

Ok thanks for your answer. Until now I didnt find it out. I even did not now how to contact the developer to ask them ...