You should try a reset of the device as that may solve the slow registering of characters problem. Backup any favorites first if you want to restore them later.

The gmaptz.img is a world time map. It will be updated by GarminExpress/WebUpdater or can changed manually by overwriting it. However the basemap, gmapbmap.img, does not get updated by Garmin's software programs. If you have an older version loaded you can manually replace it with the most recent: [Only registered and activated users can see links. ]