MarcoH, rotating textures can be performed only in Sweet Home 3D, not in the Textures Library Editor. From version 5.5, you can set any angle.

SnakeGB, I'll see if I can improve the naming system in a future version of the Furniture Library Editor.

Campi, the Jar executable files shouldn't be unzipped, run them with Jar Launcher. Note that I don't think that the Furniture Library Editor can run with Java 9 under macOS at the moment, and you should rather run it under Java 8.