Please excuse a potentially clueless question, but here goes.
Word finally used up its last last chance with me

dyld: /Applications/Nisus Writer Express.app/Contents/MacOS/Nisus Writer Express
Undefined symbols: /Applications/Nisus Writer Express.app/Contents/MacOS/Nisus Writer Express undefined reference to _NSFileCreationDate expected to be defined in Cocoa
This is sadly not a language I speak. Any clues from someone knowledgeable out there? (This could be an OS problem rather than an NWX problem, but I haven't encountered it before. Incidentally, Nisus Thesaurus starts up with no problem.)
Thanks in advance for any help!
_patrick