Any way of upgrading from 10+9, to 11, and keeping 9?

Hi,



I'm working on 10 in my own studio, and starting to begin the process of upgrading to 11, and thinking of running both 10 and 11 for a while.

So far so good.



But I'm also doing recording in another studio, and there I run a copy of Pro Tools 9, with my lisence.

They dont't want to upgrade their computer at the moment, and I don't think it can run even version 10, so it looks like I will have to do with 9 a bit longer.



But, if I upgrade from 10+9, I receive 11+10, and looses the option of running 9 in that studio.



Any way of getting Avid to grant a copy of 9 too, with the upgrade to 11, or any other suggestions?

I am looking for another solution than buying a separate 9 lisence.



Njal Frode