Balsamiq Edit: The ability to disable Autosave has been implemented in version 3.4.1
The Autosaving feature is in most cases extremely convenient, as we can merrily edit without having to save our changes explicitly all the time.
As a logical consequence of this Balsamiq mockups 3.3.5 now autosaves a changed mockup when it is closed (apparently even when nothing has changed).
But this can be very annoying when you just have opened an old mockup and changed it a bit for testing, and then close it, intending to discard all changes to keep the old mockup untampered and correctly timestamped. You never get the chance. The change sticks.
This could be circumvented however, if you added this Exit dialog which would only be triggered if something really had changed:
“Mockup has changed”
- Save (default)
- Save as…
- Discard changes
That dialog could be a Preference setting by checkbox. If not checked, all would be as it is now.