Go back to Malwarebytes and take the trial edition again for no cost. When it comes up for end of the trial period and asks you to subscribe, just ignore it. Nothing will happen and you will continue to get the free program.

You will be badgered with notices to renew but you can just ignore without worry. I have been using it for years with no problem; in fact I have used it in the last few days. If you google about the trial subscription, you will find this same advice.

Agree never to sign up for autopay. Comcast/Xfinity just snookered me this week and signed me up for autopay and I quickly changed it back.