DavidR
2
There are numerous posts in this forum relating to superantispyware/SAS where many forum members recommend it and they wouldn’t do that if it weren’t legit or didn’t work with avast!
So a forum search would reveal all this hidden information.
I don’t know exactly what you mean by future versions get added, signatures or program. It has a manual update function so you shouldn’t have to download, uninstall, install.