I just purchased version 6 but did not own any previous version. I would like to install version 5 because I am still running OS X 10.9. However, entering my version 6 serial number in the Archive page only allows me to download version 6.
We are happy to provide Script Debugger 5 registration numbers to Script Debugger 6 purchasers needing to run on older Mac OS X systems. Just send an email requesting a Script Debugger 5 license code to support@latenightsw.com. Once you have a Script Debugger 5 registration number you can download Script Debugger 5 from our archives.
F.Y.I. This is also explained in the F.A.Q. section of our Buy Now page.