I tried installing the Data Bridge .zxp using the DMXZone Extension Manager but, as you said, "The DMXZone is a new take on it and it doesn't work with our stuff", so the installation didn't work.
I tried finding the Server Behaviors and Database extension in the Adobe site, but couldn't find it (Do you have the exact URL where I could locate it?). I also downloaded and installed the Extension Manager for CC 2015 from the Adobe site, but it only gives me error messages when trying to install extensions.
As a result I'm stuck in the middle of nowhere regarding my projects, unable to use my newly-acquired Data Bridge extension, which means I'm unable to use Dream Weaver's CC 2015.
In answer to your question: The issue is that it has been impossible to install Data Bridge on CC 2015 because neither DMXZone nor any other Extension Manager seems to allow for such installation.
UPDATE: The following URL contains instructions on how to install the ServerBehaviorDatabase_1_0_0.zxp =
The probem is the zipped package doesn't contain the ServerBehaviorDatabase_1_0_0.zxp itself (!?!!??)
Any idea where to get the ServerBehaviorDatabase_1_0_0.zxp ? If you don't have this info I wouldn't know where else to turn. I've been looking everywhere on the Net and that file is nowhere to be found.