unfortunately it seems you need to reselect the port from the pop
up list everytime you start
QC. i haven't tested it yet but this may make midi a bit unusable
when embedding qc patches in
a cocoa program.
QC remembers which sources are selected when saving the composition
using a MIDI ID provided by Core MIDI that uniquely identifies the
device. If that does not work, it's would either be a Core MIDI issue
or an issue with the device driver I guess.