1. You're gonna wanna get any tool that extracts zip files. To extract files from a ZIP archive, you can use built-in tools on your operating system or download third-party software like WinZip or 7-Zip.
2. Download the game file and extract it from the files. (the extraction may close many times, what works best for me is to move the mouse around after closing the trial plan and then clicking on the file).
3. When you've successfully extracted the files, open the file that says [game].exe.
P.S, this is applicable to any zip file. I have a windows PC so the software like WinZip or 7-Zip may perform differently on a different kind of computer, i.e MacOs, Android etc. Feel free to reply if anything goes wrong.