Support of AppMon 6.5 is extended for all customers with standard maintenance contracts until June 30th 2018. These additional 3 months provide a direct migration path from AppMon 6.5 to the upcoming AppMon 2018 April release; in technical terms, to version 7.1.
If you are still on 6.5 we highly recommend to join the early access program now, so that you are ready to upgrade as soon AppMon 2018 April is generally available. Check out the release notes for AppMon 2017 May and AppMon 2018 April, to get an idea what you have missed out on so far!
Please see support levels and end of life policy for more details.