In your list, you have css form builder 2.0.2, the most recent version of form builder 2 is 2.0.1
since your installing this along side design extender, you will uninstall both form builder, and design extender before installing the updated form builder version,
I would suggest looking into upgrading to Data Bridge, IT would give you newer versions of Data Assist, and Security Assist and it would prevent these sorts of conflicts
if you contact the Sales department, you can get an upgrade discount as low as $149.99