Made this topic sticky, so your repaint collection won't get lost in this board.

I'll see if I can get it to remember the selected format. If you have selected FS9 when you click save, the downloadable file should be bmp, however it's not ideal that it reverts back to the default setting every time you click Update.
Having the elements stored in a separate table is the way to go, just have to ensure backward compatibility.
With the colour picker, do you mean the option to add custom colours? This works ok in Firefox for me but not Chrome or any other Chromium-based browsers, so I'm not sure I can fix it.
As for rotation and similar to the additional text elements, that's something I'd like to add soon.
GA is definitely overlooked by most and I think putting the effort in to make something for others is something that very few people do.