I'm asking for a confirmation from experienced MIDIboxers who are working under Windows:   In the past, a MIOS Studio Query and .hex upload didn't work for applications which applied more than one USB MIDI port. We found out, that data transfers were working again if the Query button was pushed multiple times. The reason why this helps is still unknown (only Microsoft could help us to find the answer... no hope ;-).   The proposed workaround was to install the GM5 MIDI driver, or to force MI