Newly installed osx el captain and which version to install?

Hi, I recently re-installed my apple iMac and now I am running on OS X el captain. Clean version, no backup software restored, but everything newly installed.
I have a full version parallels desktop 6 license, an upgrade license for 7, 9 and 11. Not sure how to install Parallels desktop now. should I first install the full 6 version and then upgrade? Or can I download and use the 11 version and skip the previous versions / licenses?
Can it be activated with the 11 upgrade licence code without using the upgrades? Please send me instructions
Rudy

 

Hello RudyS,
You can directly download and install Parallels Desktop 11. Once installed you can activate using the license key for Parallels Desktop 11 and the upgrade license key of Parallels Desktop 9(options to provide both the keys will be available). Refer to this link for instructions.