For those affected by the Windows bug making MIDI Guitar unusable, Vochlea has addressed a possible fix by those affected by a similar issue with Dubler2.
Check out the link below & I hope it’s of some use to y’all!? I haven’t had a chance to verify, but thought to pass this on ASAP.
“A recent Windows 11 update introduced a new system called Windows MIDI Services. This update contains a bug that breaks how third-party virtual MIDI ports work”
https://vochlea.com/tutorials/live-midi-not-working-on-windows-11