oh yes, don't worry, just go in finder and search "malwarebytes" and click on "this mac" to search everything on your mac for that term and unless its a log file made by your computer, delete it, basically deleting every remnant of malwarebytes, and redownload it at https://www.malwarebytes.com and click free download in the top right and just honestly follow all the following steps, i had this problem with my grandma's computer last week when i tried getting a hijacker virus off her computer, i tried using her version of malwarebytes but it wouldn't open, it was there, it wasn't showing a question mark (indicating missing crucial files), it just simply wouldn't work, so i deleted all stuff associated with malwarebytes and redownloaded it and it worked again, if you need anything else or have any more questions feel free to ask (also just to clarify one point, YES, it is definitely still recommended by apple, and actually even other big companies like discord and some others that i can't think of right now trust it, and even more companies that use network stuff like apparently amazon and google play from what i found actually trust it too to handle network protection (well, ok they have network protection of their own i'm sure but they just use it as an extra layer i'd presume))