Installing previous user preferences in 2.9 experimental build

Hi. I am trying to use my blender 2.83.0 user preferences in 2.9
I know I can copy paste the file in the folder, but I can not find the folder in experimental builds since they are executed from a zip file.

Besides of how to install my user pref is there also anyway to proper install blender 2.9 in windows without executing it from the unzipped folder ?

Thank yo u