How to copy (and paste) objects in Crayon Physics Deluxe level editor

Those are cosmetic. Only the stars count. You can improve your score by finishing a round in one of the following ways.

1. Hole in one - for this, you have to get the star by drawing a single line
2. Old School, and - for this, you shouldn't touch the ball or draw any pins
3. Awesome - the user marks a solution "awesome".

You can look for some sample solutions on youtube walkthroughs for each. :)

I finally found a solution. I found another folder used by the game and deleted it, that cleared the stage selection area. The folder I had to delete is (I'm using Windows 7 64 bits):

C:\Users\<<My Username>>\AppData\Roaming\Crayon Physics Deluxe

Now I have a clear stage selection area again!