I have seen this behavior happen if eCart is installed after the consolidated extensions.
you should install the supper suite extensions in this order:
eCart
Design Extender
Data Bridge
I would recommend uninstalling the three extensions, go to your download center and down load the latest versions:
eCart 5.0.6
Design Extender 1.0.7
Data Bridge 1.0.3
and reinstall in the the order mentioned above.