https://bugs.winehq.org/show_bug.cgi?id=40305
--- Comment #4 from Adam Buchbinder adam.buchbinder@gmail.com --- Yes, the application works with a native riched20! I've also written a patch, which I haven't figured out how to test with the application yet, as the build setup is somewhat complicated, but at least the tests pass!
https://www.winehq.org/pipermail/wine-patches/2016-March/148320.html