Users of UnrealScript (UE3)
Visual Assist supports UE3 via a setting in the registry:
HKCU\Software\Whole Tomato\Visual Assist X\<IDE spec>\EnableUC = 01
Support for UE3 is disabled by default. If you develop only with UE4, leave support for UE3 disabled.
Enabling of simultaneous support for UE3 and UE4 is not supported.