I was considering trying to install the new version over the old but think it just might complicate things if it also doesnt run.
Why?
I suggest you to install the new version prior for resolve the problem.
If this can't solve your problem, uninstall the console, reboot and try to install again..
This services are running on server?:
-SQL server AVAST SBC
-IIS
-Avast administration console
-Avast administration console monitor