same problem
I am using windows 7 x64 and cs6, only extensions installed are ecart, design extender and databridge. the enabled box is ticked, but greyed out..
i can neither enable or disable them
do i need to re-install them ?
**update**
I removed all 3 extensions and reinstalled ecart.
the webassist dropdown menu is still not present, and according to the extension manager, the enabled check box is still greyed out.
i can however add an instance of the cart using server behaviours
**update 2**
Now re-installed all 3 extensions, got the Webassist Dropdown again, (Just realised that the ecart options don't appear in this dropdown, but in Insert->Webassist dropdown.
So it looks like reinstalling fixed the issue, (though my enabled checkboxes are still greyed out in the extension manager)