Registry
HKEY_LOCAL_MACHINE/Software/Alvedon Computers/Version Saver
On 64-bit machines, look in the WOW6432 node.
Config Data directory
On non-Vista machines, is in a directory under "Documents and Setings", depending on the user name(s) installed for.
On Vista machine is in C:\Version Saver\Data
The usual caution is advised against editing Verison Saver config files and registry entries manually. In the event of a mistake you may need to uninstall, delete all Version Saver's registry entries and config files, and re-install.