Can I install UE 5.1 after I installed 5.3 and run either version?

hi @greenidog
In Epic Games Launcher go to Unreal ->Library

Click on the Yellow Plus + which will bring up the 5.2.1 icon

Click on the white Dropdown inside the 5.2.1 top right

Select the 5.1.1 or any version to create the 5.1.1 icon the click on the Install you will need at least a further 60DB.