Gmad will not create gma file

Whenever I drag my folder onto Gmad.exe it shows up for a split second and closes, there is no gma file created. This is what it says:
Garry’s Addon Creator 1.0
This is the folder structure:
I made sure I did not have any unwanted files.

The drag’n’drop stuff was introduced in the Dev branch only for now, if you wish to drag’n’drop, switch to the Dev branch and back when you are done.