I recently had to re-install my system software and so also re-installed Mathematica. Now, when I double-click on a Mathematica file that I had previously created, it cannot find the Mathematica program. If I create a new file, and then double-click, it knows where the program is.
How do I get all of my previous files to recognize where the newly installed Mathematica is?
I am running Macintosh OS9