I noticed the update in the download centre, I had had Memento reminder turned off so I missed it, I did resolve it by uninstalling all the extensions, Removing Dreamweaver Preferences as detailed here..
I then purchaced Data Bridge, and updated E Cart 5 to 5.04, and restarted my system, then reinstalled the extensions as per the post ...
Restarted my system again, started DW and activated the extensions, all is good now.
Well done WA with the Data Bridge Extension by the way, it certainly makes it easier to reinstall after the updates
I hope this helps.