The last time I had a PC I was using malwarebytes on it and it ended up expiring on me, something about a 14 day trail only.

I thought malwarebytes was always free? I've been using it on my phone since October and no mention of trail or expire so far.

malwarebytes wants $29.95 Cad for the full version and I'm not sure if it's worth it?

You probably downloaded Malwarebytes Premium...

Download the free version here: https://www.malwarebytes.org/downloads/

Yeah, all free software wants to set you up for "premium trials" to sucker you into giving money. It's par for the course, just say no and let yourself devolve to a license for peasants with the rest of us.