YEs, UE 4 was not updated for compatibility with DW CC.
It is posible you may be able to get some features to work, but it is not a plat form we have tested UE 4 in, so is not supported.
UE 4 was replaced by Form Builder, which was then incorporated to Data Bridge.
We have updated Data Bridge to be compatible with Dreamweaver CC. Data Bridge is the extension that we offer that is tested against the Dreamweaver CC platform.