I am on the latest revision of the emulator but I still can't find how to remap.
I have "Controller options" but it doesn't seem like I can use my keyboard to remap them (you can see on the screenshot : it doesn't detect my keyboard as a controller).
I looked the issue you linked but the person in the issue already had a .ini file, I don't have any ini file (except one from the Fightcade's fork, but I don't know if they're compatible since there's a LOT of version between their forked version and the actual version)
EDIT: Thought, it doesn't bother me if I need to manually edit my sfiii3ws.ini file, I just need to know how to get the correct key ID.