pdf trouble

I was wondering how I would go about opening a pdf file with a diferent program. When it asked the first time, I accedently choose the wrong Open With program. So now when ever I open a pdf file it uses the wrong program to try and open it. Then it gives an error message. I know I forgot to uncheck the ALWAYS OPEN WITH THIS PROGRAM. You know it's the window that gives you all the reader programs!??
Help!!
Kindra

 

Don't worry about it. Go back and find a pdf, highlight it, right click while holding the shift button. Choose "Open with," Be sure the Always etc box is checked, Then either find the reader on the list or browse to it if not present. Double click to open the file.

 

I tried using your tip and what I got when I right clicked it wasn't the same. There wasn't an open with, to click on. Now what can I do!?? I've got to go!
Kindra

 

Make sure the file highlighted and that you're holding down the Shift key while you right-click.