So I guess there won't be a mameui.chm for this release. Users can use MAMEUIFX's help.chm file. Just rename it to mameui.chm so it will work with MAMEUI. That file has been updated to v0.161. The author, mamesick, removed some useless files that were included in the compile process, which is why the chm file size is significantly less than the chm file that comes with MAMEUI.