CURRENT VERSION: BUILD 2021316_17468
I think this is finally ready for release. Download is attached to the post.
Download: https://github.com/suloku/BW_tool/releases
Source: https://github.com/suloku/BW_tool
EDIT: I forgot to mention, that sprites shown in join avenue editor are probably wrong. I made a spritesheed in order from this one (http://www.spriters-resource.com/fullview/48049/) as it is supposed to be in the correct order but most likely I messed up something .
H