How do I open it without having to buy WinZip? Every time I try open it it says "buy WinZip" for like $70AUD.
If you're using windows 10 on higher, you can uninstall winzip and just open the file. if not you can use 7Zip (https://www.7-zip.org/download.html) or WinRaR (https://www.winrar.es/descargas).