Okay, a really usefull lock function would be nice, but this is not the point I consider to return my fuze+. It is more the two known issues
- Sluggish performance with full library
- Device sometimes disconnects and reconnects while connecting to PC
which for me is basic functionality which just has to work.
The old fuze worked very well but is was unfortunately stolen from my car and then I decided to buy the newer one with more memory in the assumption to get a player which got the functionality of the old fuze combined with a newer control panel and improved software. But I don’t…
I would have really liked the player, but not with this basic problems.
I will wait until next week, if there will be another release of the firmware, but if not, I will return my player 
