Undo default program to open PDF

[Postnsons]

My chubby fingers accidently selected the incorrect program to open PDF files on my moto droid.

How do I "undo" my selection. I want an app that I paid dearly, to handle my pdf files.

 

[xCaldazar]

On the home screen press menu, go to settings, go into applications, manage applications. Find the application that is set as default, after selecting it there should be an option to clear defaults. It is one of the last options.