I just checked the official site and I saw they released a new Pad plugin
Better late than never! By numerous requests we have added support of old gamepads, which don't support Event Notification, to the PAD plugin. We hope that all PADs can now be used with our emulator. Of course, not a big change for "long-awaited" new build, but this is better than nothing.
To install, just replace default padDemul with new one.