Weland 1.4 is available from SourceForge
Fixed New/Open/Save accelerators in OS X
Split Lines Attached to Polygons preference: Enabling this will let Weland split lines that have polygons attached, as long as the polygons have fewer than 8 vertices. Splitting a line may cause a polygon to become concave; nudge the point to fix it.
Remember Deleted Sides preference: Enabling this will cause Weland to remember the wall textures on lines when you delete a polygon. Refilling the polygon will restore the textures. This should help when redrawing sections of a level.