Hi,
Hmmm. I have a hunch that something got messed up in your time/date settings in the TopoFusion.ini file.
Do you use any international settings, or switch between them (especially date formats?)
Try removing (or moving do a different directory) your TopoFusion.ini file. If starting with fresh settings gets rid of the problem, could you email us the offending .ini file?
Otherwise, if you could get the exact error message, that would help. It shouldn't be too hard to figure out what's going on.
Thanks and sorry about the problem!