Intermediate user here. I installed the 4.0.3 version. I use the magic wand to select & clear backgrounds from single-layer images. Now after I select an area with the magic wand & click delete, the background is filled with the current color on the color palette, and not the "checkboard" transparency I was used to in the old version of Paint.net. How do a change these tool settings for the magic wand to delete the selection, not fill it?