Oh, yes, we've been emailing constantly for the past month! They can't figure it out. Unfortunately, the software is written with .NET, so there's a lot going on that the support people don't know. They're trying to help, but, well, this is not the most sophisticated software around. While it works fine for what it is, it's targeted towards a limited audience, so there's not the same level of support you'd get with a more broad based software.
It is compatible with Windows 7. The latest version is written using .NET 3.5.1. It's relatively new. Regardless, they have a lot of other customers on Windows 7, and none of them have the same problem.
Unfortunately, this is the ONLY software with which I have this problem, and the issue ONLY happens when this is running.
The only other information I can give is that I recently noticed that, whenever this happens, two other things occur. 1. My disks start spinning wildly and 2. the amount of RAM the program is using increases from a normal of between 200-500MB to well over 1GB.