I can't delete resources Doom Builder 2

[Magophl]

I just can't delete or replace this:

http://prntscr.com/bs5bcx


help?

[scifista42]

Go to "Tools -> Game Configurations", select "ZDoom (Doom in Hexen format)" on the left, and delete the resource from the list in the middle.

[Magophl]

Thanks :D