Many files of Sweet Home 3D are excluded from the JAR executable file of the Furniture Library Editor, to build a JAR file as small as possible.
If you change the features of the editor, you'll have to check which files you should not exclude anymore. In your case, I guess you need the [font=courier new]pipette[/font] cursor icons found in com/eteks/sweethome3d/swing/resources/cursors folder.