Version 1.1.0 has been released. You can now create custom skins by editing the included png files! Some limitations still apply, but people might get pretty creative with this.
Version 1.0.0 has been released. After all the bug fixes so far (thank you all who reported any!) I'm now confident enough to call this update the first main release.
Happy Holidays! Version 0.1 of ReDesigner is almost ready for public testing. I'm going to make a couple of levels myself to potentially find and fix some bugs, but after that you can expect the editor to release in January or so.