Digital BW, The Print

I am dead in the water on this.  On my G5 I get the message "Required file
cannot be found.  Reinstall the program." when I try run the application.
Reinstalling does not help.  I can install and run the application on my G4
laptop.  I can only assume that the required file is not part of the install
package (contrary to what the message suggests).  As I have no idea what the
required file is called I am stuck.  Epson are not a lot of help and have no
suggestion short of reinstalling OS-X - lovely! If anyone has any clues I
would appreciate it.  BTW ver 1.1 with 9800/7800 support is available here:

http://esupport.epson-europe.com/SoftwareListing.aspx?lng=en-GB&data=339AB9D
58EEB9A0F6916D49A95D1C6D39F2E4D599E9685248E37D370BC446B6A