UE4 freeze after double clicking or editing constant 3 vectors

Hi waner_garouche -

Not a problem. NET Framework from Microsoft is running on version 4.5.1. Try downloading this latest version which can be found here:

https://www.microsoft.com/en-us/download/details.aspx?id=40773

and see if your problem clears up. If not feel free to comeback and comment here.

Thank You