Offizieller Kommentar
We are sorry to hear you are having trouble with the app.
It sounds like you should refer to the article on crashing or slow operation:
It may help you figure out your issues with dropped images.
If you don't follow the guidelines in the article that are linked to above you can't expect good performance from Map Pilot.
With regards to the 2.6.3/2.6.4 issue, we cannot help you without a more specific report of what the problem is.