Gave it a quick play around. Crashes with seg fault trying to load a ROM with the GUI. Also of note is that all the conf files created in /home/user/.mupen64plus are owned by root... making it difficult to modify manually.

Blight input configuration in the GUI now works flawlessy, however. Tried execution with mupen64plus <romname>, it crashed and now my GUI reverts back to the black GUI as well, not sure whats going on :P

Ah found the issue... it doesn't find the gles config file and crashes for it...

Now its starting at 320x240 resolution in bottom left of screen and ignoring the width= and height= in config file, are these the correct setting names for this version?

Fixed... framebuffer enable=0 stopped resolution scaling.

Also after setting Kbd Mapping Stop = 113, I can now stop emulation with q... wonderful work javis!

EDIT: If you are considering a full rewrite of the GUI... how hard would it be to seperate out the blight input configuration GUI and put that in? It works spectacularly as it is now.