First of all, I love this mod and the clarity it brings to connections.
For this update, I've installed all the Alternatives as well, cleared the Cache, and loaded up into my Creative World. And I've noticed that one of your textures may be conflicting with a texture in Durf's "The Modpack Polygons".

See screenshot of what's happening [i.gyazo.com].The polygons are supposed to be charcoal gray by default until painted, after installing the mod they have a different texture.

Hope this report helps to improve the mod!

Edit: Went back and reset everything to default, then only added the basic "Data" folder, no "Alternatives", and the texture is not overwritten now. Seems like it's one of the Alternatives that does this.