Hello

I solved the install of TomTom on my Galaxy Tab4 7 inches with KitKat 4.4.2 on SD card likes this:

1-install TomTom on internal memory
2-Start it to verify it is OK
3-Install "FolderMount" available on the play store
4-Add a pair between the folder TomTom on internal and a folder on SD card.
5-Validate and reboot
6-After reboot the transfer of the file iniciate
7-When finish, add a spindle in the "FolderMount" app. He must became green.
8-Start TomTom normally: no change for the user but the TomTom app is on the SD card !

Enjoy
Dom