: Use a free utility like The Unarchiver or WinZip for Mac to extract the contents.
: Download and install the official tool from 7-Zip.org . Once installed, right-click the file and select 7-Zip > Extract Here or Extract to "RLS2COMPS/" . RLS2COMPS.7z
Given the name "RLS2COMPS," the file likely contains one of the following: : Use a free utility like The Unarchiver