I haven't bought v 16 yet. I'm registered for v 15, downloaded the v 16 trial. I loaded it on a brand new Win7 x64 PC and I'm using the 64 bit version of TCMD. When I hit tab for filename completion, TCC locks. I can still use other tabs or create new TCC tabs. But, I can't do anything with the tab that is locked up. CTRL-Break doesn't help.