can't open chm files all of a sudden

[John Salerno]

Hi all. I apologize since this is only remotely Python related, but I 
hope someone might now the solution.

I tried opening my Python chm docs just now, as well as the one for 
wxPython, and both are giving me an error dialog when I double-click 
them and I can't open them. This happened apparently for no reason, just 
today. I even reset but that didn't help.

Does anyone know what might cause this, and if it could affect the rest 
of Python or wxPython as well?

Thanks.