Thanks Anton.
Not sure if this will help but it looks like "SCFLicense_ClothWorks_this_computer.txt" in the "SCF Licenses" gets re-written at first and then changes every time you check the license status.
The first dozen or so letters inside that file corresponds to a directory created in the Window temp directory which contains a .tmp file with a different name.
If the latest .tmp directory is deleted you will lose the license and have to start all over again after seats are lost.
That would explain the CCleaner problem someone mentioned earlier in this topic since CCleaner will delete all contents of the temp directory. It's also common for a lot of Windows users to clear that directory.