rekordbox 3.30 not reading usb

Hello,

I recently updated rekordbox to 3.3.0 only to find that rekordbox will no longer read my usb, which I have been using for many months without any problems. My usb does not show up at all under devices on the left hand side of the rekordbox screen, but it does show up on my desktop telling me that my computer is recognizing the usb but just not rekordbox.

usb: 32g datatraveler g4
computer: 2009 macbook pro osx 10.9.5