We recommend to always use the latest version

Here are the links to the release notes of the previous versions:

https://textware.com/it7pro/version_720/IT720.html
https://textware.com/it7pro/version_730/IT730.html
https://textware.com/it7pro/version_731/IT731.html
https://textware.com/it7pro/version_742/IT742.html
https://textware.com/it7pro/version_750/IT750.html

Version 750 is the latest IT7 version.

Next version will be IT8, and there will be more to tell.
We will soon disclose a link to the IT8 beta. Stay tuned. :-)