I followed the instructions, the Hud editor is working.
But when I put back the saved Config folder the same problem reappeared.
I think it's the end of testing a Pokerpopup.net HUD that's causing the problem?
I will see with them.
Thank you.

The window is invisible.
I reinstalled the latest version but still the problem.
Same problem with the PopUp editor.
Stats editor is ok.