this was my first time using the block editor, and that "close editor" button confused me. a couple of times i figured it out. but sometimes i press the X by accident and it asks me if i want to save my drawing and usually i press cancel. but this time i forgot and i pressed no, so i thought i lost 2 hours of work because i didnt save. i went around punching things and damaging my hand. after an hour of that, i came back and searched around for a backup file in my temp folder and i found one that was autosaved 15 minutes before. so i guess im ok now. but that X should close the editor and not the file itself. like in FLASH, when you go into a sub editor the X doesnt close you out of your file.