MonoGame Pipeline Tool on Ubuntu

I am using the Pipeline Tool to setup a .mgcb file. The default platform is windows and I cannot change it. I suppose i have to change it to “linux”. I cannot edit any settings. Is there something missing? Has someone had the same problem? All tutorials I found are about windows…

It is prob soemthing about user/root control but my knowlage about linux is near zero.

I can change anything in windows version.

Thank you. I change the owner (form root to myself). Now I can add the png files (for example), but I am still having problems with the settings.