What I got from the sales:
In accordance with our sales policy
http://www.r-tt.com/BuyOnLine.shtml, we guarantee customer support service within one year from the date of purchase. The services include technical support, customer support and all updates and new releases for the purchased product during that term.
When the free support service expires you may renew the service or prolong it using the software version compatible with the original registration key. The software license never expires.
The services can be renewed at any time but the extended support period is always calculated from the service expiration date. It's a type of upgrade. The cost of the upgrade is proportionate to how old the software version is.
You purchased R-STUDIO license on Sep 26 2010 and free support service for your license expired Sep 26 2011. In 2014 you decided upgrade the software and paid for the extended service for the period from Sep 26 2011 until Sep 26 2014. So, you received a new software registration key that was valid for R-STUDIO versions released before Sep 26 2014 and you paid US$59.97 instead of US$79.99.
Sorry, but you may NOT pay for 3 years of the support service in 2014 for a license purchased in 2010 and then get the software upgrades and updates until 2017.
Now, you may extend the support service again for the period from Sep 26 2014 until Sep 26 2015 and get a new R-Studio registration key. It would cost you US$19.99 for one year. If you decide to upgrade the software in 2017 the support period for your order will be calculated from Sep 26 2014 anyway.
Also, we must draw your attention to the fact that R-Studio software ((Standalone license) is licensed per machine not per user and cannot be transferred from one machine to another if the software has already been installed and registered. If you change the licensed machine you should consider a new license of the software and the order ID for the original license can be used as a discount coupon.