I did see the new version on the board, a bit late but now I did try.
1. The GPX loads in fine, but uploading to the GB580P it crashed.
2. KML loads correct and upload no problem, but no data (distance, avg etc.) in view only the date, the problem it is not the GB580P but the TG software!
3. configuration (GB580P) - device configuration- uploading the config. the data fields are not the same, known problem.
4. no search on names possible, only on date
5. Not possible to upload waypoints as a route, still manually input of waypoints necessary.
There is still a wishlist, the new version is not much better than the v1.6.2. Sorry I can't say it is a jump a head, but a snail step.