I would like to do a test run of an import. But, I was wondering, when I'm actually ready to do the actual import, do I just run the import again, or do I have to strip everything out before running it again?

This is an import from UBB.Classic 6.7.3 to 7.2.1. I've successfully got everything all installed/tested to the point where it is ready for the import.

Thanks,
Tim