Corrupted File

I'm very sorry to make another file corruption post, but I don't know what to do. I saw the master-post about what to do with a corrupted file, but I don't understand how to do the stuff it wants me to do. The part that pertains to me is this:
"If MuseScore 4 cannot open it, use WinZIP or 7Zip or something alike to open the mscz file (which really is a ZIP archive in disguise), extract the mscx and open that with MuseScore 3.6.2. You can also extract the score_style.mss and use Mu3's Format > Load Style on it. In either case ignore the warning reg. them being from a newer version of MuseScore. You may want a Ctrl+A,Ctrl+R after that to reset everything to their defaults"
since my file will not open. My problem is that I downloaded WinZIP but I just don't get how to use it to extract the mscx from the mscz file. I tried to Google it but everything concerning mscz file conversion says to just use Musescore to do it (ie just save it as a different file type) which doesn't work because the file won't open to begin with. Is it possible for someone to give me step-by-step instructions on how to use WinZIP to extract the mscx file? I'm very sorry if this is a dumb post, I tried my hardest to just Google it myself but nothing was giving me what I needed :(((