You could try to use the same properties as the ones proposed for Sweet Home 3D.
To run a Jar executable with these properties, you don't need a .ini file but rather directly cite these properties after [font=courier new]java[/font] :
The problem with this solution is that the resolution scale won't influence the height of rows in the table of the editor, so text in the table might be cut for a high value.

As Java 9 is supposed to have fixed problems with HiDPI screens, it might be interesting to give it a try too. If it works correctly, then no need of any option, just double click on [font=courier new]FurnitureLibraryEditor-1.21.jar[/font] file.