CWYW (X6) and Word 2013 Issues

I know this problem has been addressed in other posts, but none of the solutions have worked for me.  When I try to add the CWYW plug-in in Word (2013 64 bit running on Windows 8 64 bit), I get that it is “not a valid Office add-in.”  I have tried downloading and installing the patch from Microsoft (vcredist_x64.exe) to no avail.  I have also tried uninstalling/reinstalling Endnote X6 as well as registering it through command prompt.  I can’t seem to find any other fixes. Any suggestions?

yes, I recommend you call tech support?  they can walk you thru things to look at far better than we can.