If this trick expires in 30 days, repeat these steps. It will login automatically, and will not complain about outdated version. There you will find your config.xml file. Type the following in the Run box: %APPDATA%\Skype Please see the ultimate list of all Windows keyboard shortcuts with Win keys). Press Win + R shortcut keys together on your keyboard to open the Run dialog. Now, in your config.xml profile, there will be a 'Credentials2' section with your Skype-signed public key. Check 'Auto sign-in when starting Skype' (i.e. It is a good idea to start your search from here: Old versions of Skype (UPDATE: the link is dead).
The old version of Skype will use the saved credentials from the newer version and will work without issues.
Check the automatic sign in/save password option. Update: our reader ' Raven Killer' has suggested the following solution (and I can confirm that it works):
Here are step-by-step instructions, please follow them carefully.
