Webassist products not working in DW CC 2015

Recently upgraded to DW CC 2015 to use Bootstrap.

Used DMXzone Extension Manager to load WADataBridge123.zxp, UE401.mxp and WAeCart609.zxp. Uploaded Deprecated Server Behavior from Adobe AddOns

They uploaded when DW was reopened and all the extensions are there. However, I've tried using several of the extensions and none of them work. Most windows either open and close immediately, nothing happens at all, or I get error messages. For example, for the eCart Object I get 'DLL.checkSerial is not a function'. For the Image Resizer, I get 'Image Cache objectTag Error ReferenceError: WADA_Bundle is not defined.

Also received the error, my page is not a php page, though I've created New PHP page, PHP is selected in Managed Sites, and all my databases are accessible through Databases panel.

Though I've installed the Server Behavior fix, in DW > Window > Extensions, it still says 'no extensions available'. It also doesn't show up in the DMXzone Extension Manager either in CC or CC 2015. Not sure if this means anything.

Lastly, DMXZone indicates the Server Behavior fix is deprecated in favor of their updated extensions. Should I install these instead?

Please advise.