(1) Start the action editor
(2) Open the .bjf file that contains the actions (either the original, or the add ons)
(3) On the very left, you'll have a list of each title name in the file
(4) Click on the action on that left list... as you do, that will change the info that comes up on the right side
(5) Go down and select the action(s) that you wish to remove
(6) From there, either type Control-D, or you can go to the menu up top, select "Edit", then drop down the list and choose the option "Delete Action"
(7) Repeat, for each action you want deleted
I hope that's clear enough, if not, let me know

J