I had the same issue, but solved it first via manually changing the config-file.
It worked fine but someday it didn’t anymore. I followed the steps from gizmo98 and now configuring works fine for me and as I look up the conig file, everything is set up correctly. But then in (for example) DOOM the R2-Button (right bumper) won’t be noticed! Is there a problem with older corrupt configurations and DOOM not noticing the change? Have I to update or reload something=