My Ableton client crashed at some point and now it freezes upon startup. I get this message, but once I press OK it's frozen on the splash screen and I have to kill the application in task manager.

"Live's last program run was abnormally aborted while trying to open the MIDI port "WIDI Master IN."
This MIDI port will no longer be activated upon startup. In order to reactivate this port, please use the Active Ports list in the Link/Tempo/MIDI Preferences."
Any ideas?