Sounds like some of the applications may have lost their file associations. You could try going to your start menu and typing "file associations" in the search bar. Then select "Change the file type associated with an extension." At this point, you can reset the file extension for uncoperative program by choosing "Change Program". (Of course, if they seem registered correctly, then it's something else.)
Re Crystal, what version? I see a lot of threads asking about compatibility out there... it leads me to believe that older versions may not be...
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