The Help - About menu shows the version of ToyBase.  There are three major versions:

• 7.0.nn - the latest version can be installed via downloads from this website
• 6.4.n - the older version of ToyBase and can only be installed from a CD. You might have trouble running this on Windows Vista or Windows XP. I recommend you upgrade the software to version 7.
• 5.nn - the very oldest ToyBase! Not many people will still be using this as it pre-dates Microsoft Windows

You can also access this page by clicking the logo in the top-right of the screen.