I’m not sure if this is the right place to do so, but I’d like to make a suggestion for the Automatic / Manual save thing
So what I noticed, is that I really like automatic saving while actually working on something new, but really hate it when I open a mockup just to fool around (like, deleting elements for a temporary PNG export). I tried switching to the new manual save feature for this reason, but since you successfully made me get used to not having to press CTRL+S all the time, it feels a bit scary (like “oh gosh, I didn’t save for like an hour”), even though you supposedly have a nice auto-save-backup thing as far as I know (I didn’t really try that so far).
So what I’d really like is something in-between: don’t turn on auto-saving right away on documents I open – but after manually saving for the first time, offer turning on auto saving for that document in that session only. If you know CodePen, this is kinda the way it behaves. (They had to make this right as CodePen is just as much for fooling around with tentative changes as it is for building things, and I really like the system they came up with. They even notify you if you make a significant amount of changes without saving, like “hey, shouldn’t we switch on auto-saving for you?”)
It would be so awesome to have this in Mockups too