Removing that stubborn glove box door latch

[Tx Firefighter]

I parted a truck recently and came up with an intact glove box and door for my dually. I want to restore the box door before installing it though.

Question is, how to I remove the turn knob/ latch deal ? I see the paper clip hole and have been fumbling with it an a tiny allen wrench, but can't figure out how it releases.

It's a non locking knob by the way.