The safest way to find older builds is through the page.
While the 40198 Beta is stable, most users will find better performance in . However, if you are running a specific legacy app that crashes on Android 9 or 11 (which newer emulators use), or if you prefer the classic BlueStacks 4 UI and sidebar, this version is a solid choice. bluestacks 40198 beta version download link
If the official site has archived the link, reputable software mirrors often keep the installers. When using these, always verify the file hash to ensure it hasn't been tampered with. The safest way to find older builds is through the page