Hi John, Welcome to The Hub!
There are newer versions of the VM files on our GitHub:
https://github.com/extremenetworks/Virtual_EXOS
The xKit site is supposed to have been taken offline...
Regarding the SSH module, you will need the file made for the VM; it requires a different xmod than SummitX. I'll upload the correct files for all of the versions on Github. It will probably be Monday before I can get to it though.
Once they're posted, I'll update the thread here. Will that work for you?
-Drew