See attached screenshot
Next version will have an easily configurable 'Memory mode' which changes different settings to adjust RAM usage.
Nothing has changed, except the menu name xd I mean, file being in use is either a Foobar thing or your OS or your HDD being too slow. And it may happen randomly.
I can adjust the timeouts between tools to give more time between them, but that's totally random anyway. I could allow the user to set the timeouts though, in case the standard ones don't work.