How to change/remove original collision shape from an actor?

I have an actor that i created in Pivot Stickfigure Animator, along with all needed animations. I exported all of the scenes into a PNG format, opened them in Gimp to remove the background and then imported them into Stencyl. I was wondering how i can remove the original collision shape from my actor? I have added collision shapes in via the "Collisions" tab to fit the size of the actual actor but the original ones are being used, and are too big for my game, meaning the actor doesn't touch the floor. I have tried the "Auto-Scale Collision Bounds" and neither work. Any ideas?

EDIT: I have also removed the original collision shape from the "Collisions" tab, however the original is still visible in the scene and is still active during gameplay.

  Simply, click in the collision shape, and press the key "Delete" on your keyboard.

It does not work. The original collision shape shows up in the scene. I have removed the one from the "Collisions" tab, and added my own, but the one around the player remains and does not disappear, thus meaning the actor cannot function correctly.

  Strange problem. The "Delete" key has always worked for me to remove the collision shapes.

Try removing the actor and add it again.

Check this out.

http://www.youtube.com/user/ArtificialStudioInfo