Hi,
Cherrykiss87. According to the website 7-zip.com WinRAR does support the 7z compression scheme:
Quote: 7z is a part of 7-Zip program distributed under the GNU LGPL ... Applications that support 7z archives: WinRAR, PowerArchiver, TUGZip, IZArc.
ps: you can download 7-zip here:
http://www.7-zip.org/download.html
If the archive is corrupt, then you would need to post a request to the request thread cited below or else send a PM to Stevie1352 and ask if he could pack the files in a different compression application. Good luck and let me know what eventuates.
https://www.forumophilia.com/topic22868.html
Abraxas