Help! Bitdefender is blocking web pages

My spouse installed Bitdefender antivirus software on our computer a while back. It is now expired and has not been renewed. However, somehow when I try to access some web pages, I get a screen that says this page has been blocked by Bitdefender. This seems to happen on about one out of ten or so sites. The sites I’m attempting to access are not porn or anything salacious, just run of the mill sites. I believe it has even blocked some Straight Dope threads.

Can anyone tell me how to get rid of these Bitdefender blockages?

Disabling Bitdefender comes to mind.