And it happens again and again that the items in a list can't be deleted. The only way is to delete the whole list and reenter the items in an new list, or delete the item directy in the database.
Fair enough, its still a free beta version...
There are not much GPS tools on the market... if any. I couldnt find anything useful until I found CJ GPS-Tools. This does exactly what I was looking for. Even though I have not yet installed any other additional plugins or modules for this tool.
The service and response of Maverik, the Developer, is excellent!