My AutoCad MEP 2010 software expired. Can I uninstall it from my computer and download AutoCad MEP 2011 instead?
Do you mean the free trail? You will have another 30 days grace period for different versions.
I believe menyax is referring to an educational license, which was termed under the previous policy for 18 months.
The answer to your question is yes.
As long as you are still a registered member of the Education Community, you can request as many licenses (with the limit of 1 per product version) as you'd like. Uninstalling the expired and downloading and installing the current would get you back up and running. Additionally, as all of our programs operate independently of one another, it is possible to install multiple versions of the same product on the same computer without issue.