I have a new asbuilt for your APIM for you to look at and try. This fixes other things, like maybe a clock that does not keep time or change DST right now, and a few other things. I will PM (message) you the details.
You can update the maps via reformat like you did before using the Syn3 Updater. I recommend staying with Sync 3.4.21265.
I removed the ignition key and let all go to sleep, turned radio back on and navigation is back as original with all the options! Hard to believe it was that simple. Thanks so, so much!
Wish the 8 inch screen had the day, month and year like the 4.2 inch screen did, but I’m delighted with having navigation back as that was my primary need. I’m not concerned with the display illumination icon being grayed out as I’ll leave it on night screen mode for now.