Preferences for MIDI I/O not saved in version 3.6.2....
I have updated a few days ago to the current version. I select choices in the MIDI In and Out drop-down boxes on the I/O tab in Preferences, and then hit Apply, the selections then disappear when I close the Preferences window. I have tried restarting the program and the computer; restarting the Audio/MIDI devices, and continue to have this issue.
My MIDI keyboard does not work as a result. I am using the same hardware set-up as always have, and I have not had a recent upgrade to WIN 10, so no changes there.
The MIDI keyboard/interface hardware etc. still works with other programs.