I wouldn't worry about CL checking to see if you have it on more than one of your computers: They don't answer the phone or return calls so I doubt if anyone's even available to do any checking. In regards to this piece of software, it looks like something that's been badly needed for a very long time, and the price iws more than reasonable. Speaking as one who just migrated from Mac to PC, I've found that a lot of my references do indeed need serious cleaning up. I'm looking forward to the release of this remarkable piece of work!