Mac,
I am sooOOOOooo humbled by your experiences and Audio Knowledge.

I went into the EVENT WINDOW of PTP12. There are 3-unlabeled columns to the right of the labeled columns. From left to right of the unlabeled Cols: 1) Is the music Note & Octave; 2) Is the Note's Velocity; 3) I don't know the purpose. Every row has either a 3-digit or 2-digit number.
So, I scanned the Help files for Patch Changes & began examining each entry. I found your solution in the PTP's CLASSIC TRACK WINDOW. I matched the Patch # from Proteus VX of the Preset/Voice that I wished & manually entered it into the PTP's CLASSIC TRACK WINDOW. IT WORKED!
Until now, I have never had a use for the CLASSIC Track Window of PTP12, I just used the new TRACK, Mixer, Notation & Events Windows.
What have I learned today from the Master? 1) When using 2 or more software involving MIDI Patches, make certain I sync Patches in ALL other software to the same MSB/LSB of the Preset/Voice/Patch that I am actually using! (If this is wrong, by all means correct me!) 2) Read more of PTP's manual and keep testing what I read!

Thank You for shortening my learning curve- again, Great Mac-Yoda,
-Mo