I'm using OZI ExplorerCE on my HW6515 and have run into the same problem.
I'm fairly new to Ozi and the only way that I know to enter waypoints is to use File, Waypoints, Create WP at Position. Then I go to File, Waypoints, Waypoint List and edit the position. This worked fine for a few weeks. However since a few days ago the Waypoint List option is disabled .
Also the GPS is not detected any more and I could not find where to change/select the GPS settings.
Also I'm almost sure that there was button bar visible at the the top of the screen. This is also missing or just my imagination...
I've tried uninstalling and reinstalling but still wouldn't work.
Any suggestions?
(Antwoord mag gewoon in het Nederlands...)