Old Version?

I had a terrible time updating my Comodo Internet Security Pro. Kept getting disconnected or wouldn’t install. I finally went to the site and downloaded the one I needed and installed it. I now realize I have a free version and the purchase code I was given does not fit the new CIS Pro. So, I obviously wasted money somewhere along the line. Do I need to pay a yearly fee now? Everytime I support a new internet security program by paying money to the fledgling, I am always left with just another yearly subscription to the new and improved version of the last company. So, who is the new internet security upstart I need to support while they make it big. I don’t pay yearly fees.