I cannot edit any global Datapower settings, any project specific Datapower settings, or change the Map Runtime to Datapower (in this case there is no selection avaialble only the Websphere Transformation Extender option).
Install History: I had mistakenly installed 18.104.22.168 and thought it would work with Datapower . I then realized I had the wrong WTX version and installed 8.3 along side the 22.214.171.124 install and everything was glorious ;->
After discovering that 126.96.36.199 and above are supported on Datapower I then installed 188.8.131.52 along side the other 2.
I then thought that I missed something in the install so I removed both 8.4.x.x instances (leaving the working 8.3 install) and re-installed 184.108.40.206 using the Custom option. I did not see any option about Datapower and the same symptoms were still there.
This post by HemannSW: https://www.ibm.com/developerworks/community/forums/html/topic?id=f0644d1c-90f1-4e7e-ac91-933ec75986eb states that the WTX version should work with datapower.