Licence Query - What version of PT 12.8 Can I Run?

[barneysurfer]

I purchased an Apogee Quartet Bundle back in 2016 with a subscription Protools Plan now expired.

I am currently running Protools 12.8 on OSX Sierra 10.12.5 happily, but Sierra is getting a little old in the tooth.

What I am wondering is whether I have the option to go any higher within Protools against my expired subscription plan that I didnt push upgrading at the time due to basically happy with the stability on Sierra.

My Ilok accounts shows a subscription plan was Deposited 17th August 2016, has an Expiry Date of 10th August 2018, so the question is can I move to Protools 12.8.3 under High Sierra which was released 19/12/2017 under that expired plan?

As there is quite a lot of effort moving to High Sierra due to Mac SSD File system changes, I dont want to try only to find has been a waste of time.

Getting head around licencing, especially with the added changes now has never been that easy.

Any advice greatly appreciated.

J