To access the Universal Email extesnion, go to Insert -> WebAssist -> Universal Email.
make sure you are not looking on the Insert bar, it will not show up there, but on the insert menu.
You can also access it through the server behaviors panel.
Go to Window -> Server Behaviors to open the server behaviors panel. Click the plus button and select Web Assist -> Universal Email.
Same holds true for Dynamic Drop downs. It cannot be accessed from the Insert bar, but from the Insert menu:
Insert -> WebAssist -> Dynamic Dropdowns.
Or from the ser4ver Behaviors panel. Click the plus button on the server behaviors panel. Select WeabAssist -> Dynamic Dropdowns.
Some behaviors from Dynamic Dropdowns are client side, so you will need to access them from the behaviors panel instead.
Go to Window -> Behaviors. Click the plus button and select WebAssist -> Dynamic Dropdowns.
If you are still having problems accessing them, close Dreamweaver, Then open the extesnion manager and make sure those extensions are listed and they are enabled, if so open Dreamweaver and try again.