I was trying to open a zipped file so I could print it. I tried to open it with acrobat but it wouldn't open it. Now, it is opening all my files with acrobat. It also changed all of my zipped files that I had on my computer into acrobat. How can I undo this? Also, how can I uncheck the box that says always use this selected program to open this kind of file? Thanks in advance. Your help will be very much appreciated.