I am running XP SP3. I have been using SH3D for some time, and followed the prompt to update to 5.7 today.
I spotted the FurnitureLibraryEditor program while on the website.
After some fun and games I found the java program in C:\Program Files\Sweet Home 3D\jre8\bin.I copied the .jar file into the bin directory, and double clicked - nothing happened.
What am I not doing?