I use a MacBook Pro with OS X, 10.7.4. I had needlessly clicked "make Adobe your default for all PDFs" and I no longer wish to keep it as such. Do I have to uninstall Reader X and then re-install it, in order to eliminate this?
Select the icon of a PDF file. Go to File > Get Info (or cmd-I). In the new window, go to Open with and choose in the pulldown menu the application you want to use to open PDF files. Click on Change all... Close the window. Come back here and tell us if this did it.
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