Initial signs are good - it's running, charts load (seemingly correct including departures) and the SIDS and STARS are loading correctly. Maybe a cleaner way, ut here's what I did:
1. Copied the entire contents of my GTN750 card (all the files in the root folder) to the C:\ProgramData\Garmin\Trainers\Databases folder, and OVERWRITE originals.
2. Copied DATACARD\ldr_sys CONTENTS (two files) to the C:\ProgramData\Garmin\Trainers\Databases folder, and OVERWRITE originals
3. Copied DATACARD\active\fc_tpc FOLDER to C:\ProgramData\Garmin\Trainers\Databases\fc_tpc folder, and OVERWRITE originals.
Looks good so far, hope this helps others.
-Brendan