I have been using Avid 6.5.4 in trip mode on a project for about a month.
I then purchased online the monthly option of MC 188.8.131.52 (because I was told the .2 patch would allow me to use the software with a monthly subscription where 6.5.4 would not.
But after a frustrating morning on the phone to Avid, who were v good actually.
We still couldn't get it running. It was stuck on a loop on the registration page bit.
Mac Media Composer 184.108.40.206 and Symphony 220.127.116.11 can recognize a Media Composer 8.0 and Symphony Option Activation ID, respectively.
Windows Media Composer 18.104.22.168, Symphony 22.214.171.124, and NewsCutter 10.5.4.2 can recognize a Media Composer 8.0, Symphony Option, or NewsCutter Option license if the latest version of Avid License Control is installed.
he chart in the article link below explains what earlier versions of Media Composer, Symphony and NewsCutter can run with a new Media Composer 7.0, Symphony Option, and NewsCutter 11.0 license (dongle or software).