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Unable to open .puz files. Invalid extension


When I attempt to open a puzzle, I am asked it I want to go on the web to find a program to open the file with .puz extension.

I can think of two things:

1) .puz files require the Across Lite software.  If you don't have it on your computer, you can download it here:

2) If you've already installed Across Lite, then you need to make a file association between the .puz extension and the software.  To do this -- on Windows-- go to the Windows Help and Support feature, search for file extension, and follow the instructions (which are pretty clear).  I don't know how this is done on a Mac.


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