hmm... im not sure what could be causing the problem. never heard of
www.plimus.com before, or the error you are experiencing.
i went with steam because alot of people use it, so i knew if there was a problem, there would at least be some kind of support for it.?
i tried googling DW/English text library file failed to load/and plimus.com, not really seeing anything that will help, unfortunately.
are you able to contact plimus.com directly for support, or do they have a faq for DW, or a forum for tech support?
you may also try sonalysts.com and contacting them as to what may/may not be causing your problems.
its either got to be a bad download, a bad install, a patching error, or a hardware/software problem.?
i assume you have all drivers up to date and your pc meets minimum system requirements?
hopefully you find an answer somewhere.