How do I install an older version of 4.4 when I already have 4.4.3?

I need to revert to 4.4.0 to be compatible with my project, as it currently crashes upon launching 4.4.3. How can I go back to 4.4.0, or even 4.4.1 or 4.4.2? The Unreal Launcher only offers 4.3.x and 4.2.x etc, but I need 4.4.0

Crash Report:
!Id:0d99d9f3e8b848952be0491a3d539725

We apologize for the inconvenience.
Please send this crash report to help improve our software.

Can you explain some more about the crash? Like, when you launch on a specific project it crashes, or is it everything?

Just so some staff can help you when they see this.

I can open a new project in 4.4.3 no problem, I’ve even uninstalled and redownloaded 4.4.3 three times now. Its when I open a project that was created with 4.4.0 in the 4.4.3 engine it crashes upon launch, giving me a crash report and closes.

Hey Bumdee-

It is not possible to downgrade from a hotfix via the Launcher. You could get the source code from Github.com for the 4.4.0 version of the engine however. Here is a tutorial video on how to set up github on your computer:

Once that is done you can get the 4.4.0 version of the engine here: https://github.com/EpicGames/UnrealEngine/releases/tag/4.4.0-release