SpywareBlaster 5 was released on March 02, 2013. In recent months, immunization updates have been less regular. It's never added to the hosts file, but has a facility to back it up.
It does add to the Restricted Sites for MSIE, and immunizes against ActiveX CSLIDs that have been found to be malware. I don't use the cookie immunization for Firefox, as I use Firefox extensions for that.