resetting default settings on steam install

hi, i chagned the resolution on steam version of PoE and now i get a black screen on launch.

does anyone know how to reset / change the config file for steam?

i looked it up, but all the results are for the stand alone client which has different file names, steam files names are all different, couldnt find the ini or config files.

ty for any help.

problem sovled in terms of black screen, game works after hot fix, ty GGG.