Enter Registry by typing: regedit in Windows Menu or in Windows+R
Go to: Computer\HKEY_CURRENT_USER\Software\Epic Games\Unreal Engine\Builds
change Engine Association like {184A0552-4854-919D-C57C-75B89AA1BE0A} to whatever you want to, but then edit YourProjectName.uproject (not shortcut) in notepad and look for “EngineAssociation”:
Then change for example my above {184A0552-4854-919D-C57C-75B89AA1BE0A} to for example “5.6”.
or run every .uproject that used this version and select your newly edited name
Done
I’m glad it took me about an hour during the last MegaJam
We used the Nvidia branch of UE5 and every user on git was having a different engine association so I tried to rename that key to UE_Nvidia and luckily it worked!