in the install tips, i say:
Install these extesnions last, in this order (there is no order for other extensions):
CSS Form Builder (Make sure to use the 2.0.1 support release 2 version)
Security Assist 2
in the case of design extender, it should be installed before security assist, so when installing the update, you should uninstall security assist, uninstall design extender, then install the design extender update, then re install security assist.
the procedure depends on whether the update being installed is on the install in this order list or not. If it's not on that list, then no special action needs to take place.
if it is on the list, then any extensions that should be installed after the one that you are updating should be uninstalled, then reinstalled after the updated extension.
so if a form toolkit update is released, you will need to uninstall all of the extensions on that list, then install the Form Toolkit update and reinstall the others in the order listed.