HPL Level Editor | Primitives Problem Thread

Hey guys, i wanna start an Custom Story for Amnesia, searched for an editor on Goole and downloaded it. I scrpited everything and so on, so I wanted to make the starting map. It has a floor BUT there is one problem:
If I want to change the building from floor to wall I have to klick on the scroll down menu an choose that, what i want to build. Here is the problem, there is only one word, nothing else.
Do you know how my problem can be solved?

I hope you could understand everything, I'm from Germany =D

Greetings
-Mutzke