I have been working on another save-breaking feature - context-sensitive manipulations - which, simply put, is origin points that make sense. Even I, as the maker of the thing, was getting confused which way mirrored things should scale, etc. So now filled things have a center origin, half things have a top origin and corner things will remain corner originated:
This gives way more freedom in combining shapes as well is just plain more sensible and easier to do.
I have also implemented the aforementioned ability to load a background image. But since a system to manipulate everything on the screen (UI, whatever) is being built that's not published yet.
This should also tie in with some more decent upgrades to speed and such which should also fix the cursed Ctrl bug. Hue issues also hopefully fixed with a rough workaround.
Also you may notice new part designs - all done in 3D for proper shading and such. I hope to finally finish the first full part set with the next big version. Stay tuned.