Try downloading Japanese text suport, or renaming the files that won’t open, if you can. Non-jap versions of windows HATE anything with non-roman characters in the filenames or file-information. It works fine for me and I have Jap text suppoert so that may be the problem. 90% of the included files are in Japaneese so they’ll %$*% up window’s filesystem sometimes.
I don’t know if it works the same way with Mac or Linux, but the text pack should fix the problem.
Oh, and thanks to Dark_Dragon943 for the link. Sinful Rose = win.