Right-click the file and select "Extract to..." to see the underlying Swedish lexical documents.
To view the "SweLexRed" contents, you will need a third-party utility since most operating systems do not natively open 7z files: SweLexRed.7z
Use 7-Zip for Windows or alternatives like PeaZip or The Unarchiver for macOS. Right-click the file and select "Extract to