Thanks again. I cleared the cache, removed any reference to tomtom from folders on SD card and phone, ran a repair on the microSD card but none of these made any difference. In the end I removed the microSD card and installed the patched version and it worked. I know it will have installed the maps on my phone internal memory - but I don't know why the patched version got stuck at 'loading' with a microSD card in when the Google Play version doesn't. The patched version didn't even get as far as seeing available maps to download with my microSD card in. So I guess that my microSD card may have issues (not noticed any with other apps) or the patched version isn't set up for installs to microSD.
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