Updated to 6.0.7, and now I get the following error every time I close the tool:

"Unable to write to file. C:\Program Files (x86)\KVS Availability Tool\RegV2.dat [76] Path not found"

Went to the KVS folder in Program Files and indeed, there is no RegV2.dat file there. I have to re-enter my registration number each time I open the Tool in order to use it.

Have been a long-time user and this is the first time I'm seeing this. Tried uninstalling and reinstalling and still seeing this error. Any ideas?