I used to download maps via the setup utility and sync to my devices with the apps (desktop and Android client) Myphoneexplorer. Since quite a while I face difficulties with that sync process. Anyway it ends with one broken map on the device.
If I start Navigator, I just get the starting splash screen and Navigator closes immediately. After replacing the corrupt map "manually" (manual file transfer via USB and such), I can start Navigator to work again normally.
I am wondering, why Navigator is closing at start because of just one broken map at the same time, when there are plenty of other maps on the device, that are not broken.
Navigator should give a message, that it found a broken map, name the file(s) and than continue with the remainig maps.