UBB.threads PHP Forum Software Community Forums UBB.threads Importer Support Import Members but Not Forums

I'm running UBB.classic 6.7.1.

Would it be possible to install UBB.threads and only import the members and not the forums/posts?

Just trying to think ahead. If I run into an import problem with forums, I wonder if I might just start fresh with a clean board.

Last question. After I make the transition from Classic to Threads, can the Classic board still exist as a read-only archive?