Thanks Alan.
I've fixed the problem by uninstalling again but this time I then deleted the remaining folders that were left.
I then ran CCleaner as a precaution and re installed.
Hey Presto I've got my map back.:)
I then found out why I was getting double the range.
When I had no map view and trying to get it back, one of the things I clicked was 'set as home location'.
Well for some reason that setting wasn't removed when uninstalling and now I can see the map, My 'home' location is about 20 miles to the west of Dublin!
I'm actually in Watford (about 20 miles north of London)
Thanks for following this thread and trying to help me out mate.