Default [Q] Cyanogenmod 10.2/4.3 and SD card use

I've just flashed the stable version of CyanogenMod 10.2, so upgraded to Android 4.3. TomTom can no longer use the SD card to store maps, putting them on the internal storage instead. I've had a look around but I can't see a solution to this - is it possible to get TomTom (and other apps) to use the external SD card with 10.2?