In my experience the last few years, SuperAntiSpyware and Malwarebytes are the two all purpose anti-malware programs that I keep handy in case of trouble. They have helped at work with other computers messed up and for me I run an occasional scan for that extra layer of peace of mind. All that is even in an "on demand" mode, they probably have a real-time mode. Sometimes these programs can fully solve a problem, thus avoiding an OS reinstall, and they are the leaders of the genre. (Although there are specialty products for specific malwares and many of the big vendors could have similar programs in their arsenals, not as easy to find and work with and depend upon.)
However, it will be surprising if this buyout keeps the program quite as available and helpful to the shareware-freeware user. For $10, knowing the risk that things could change, it could be a reasonable purchase.