When you install VersaPro without a license you start a four-day trial period. During that trial period, the software is fully functional with no limitations on program size or communications capability. After the four-day period, you can no longer create new project files or modify existing ones unless you get a license.
When you start VersaPro after the trail period has expired, you get the message that Ron saw. If you have a licensed version, you never get that message. It sounds like the software's license manager can't find the license for some reason. If the license hasn't been moved to a different sector of the hard drive during a defrag operation, then the sector where the license is located may be corrupted. Either that or someone has transferrede the license to a different computer without Ron's knowledge.
Ron, if you still have the VersaPro CD, you can uninstall the software and then reinstall. That will restart the four-day clock. You will not lose any of your project files due to the uninstall.