It may not be officially supported but 2.01 runs just fine under Windows 7 64bit. I have multiple machines running it without any issues.
The only issue is the registration utility which you need to set to run in Windows XP (SP3) Compatibility Mode AND also as administrator. Once you do that, the registration utility will run and allow you to enter your license key.
But we’re off track here…I need 2.5 completely removed off the PC. All preference files, registry keys, etc. So beyond the uninstall routine, where could any lingering keys/files be residing?