My 765T has a popup right after the warning page every time boot up shows that "There are locked data files on your device". But I can't find any locked files in it and I can use the detailed map and 3d map for navigation without any issue.
Then I deleted all map files in /Garmin folder. Unfortunately, the popup still there. That's weird. There's not even a map file. What else is able to be locked?
My 765T runs 4.0 frimware and trying to load North America 2011.30 map.
How to solve this problem?
PS: I had deleted gmapprom.gma mistakenly when I was deleting *.sum files with no backup.