2 VFP sessions running; 1 hangs and so does the other

VFP9SP2 Win7Pro

Had a long running Quickbooks query from VFP (via QODBC tool) take forever. I launched a 2nd instance of VFP to work on something totally different. While editing some code in a PRG, my 2nd VFP session hangs. I leave it, come back HOURS later, still hung. Both VFP sessions. I'm guessing this is because it's single-threaded (although I'll be the first to admit I'm not a threading expert).

Ideas?

Thanks, --Curious in Maryland