These extensions:
Digital File Pro 2.0.4
Cookies Toolkit 3.1.3
Site Import 3.0.4
Site Sculptor 1.0.0
CSS Sculptor 3.0.2
Are integrated into Design Extender and Data Bridge.
Those extensions should not be installed.
uninstall those extensions, design Extender, and Data Bridge, then reinstall Design Extender and Data Bridge.