Since there is only one change, there are a couple of suggestions:
1. Reinstall SP2.
2. Uninstall and Reinstall Topo. You might have to re-link any data files you installed on your hard drive ( Map Files / Add / Data Locations)
3. Try using the Search link to see if anyone else had this problem.
I have T5 with SP2 and a Garmin, I haven't experienced this problem.
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