Legacy - Is there a way to clear out or set back to "$0" the budgets after using the Auto-Fill?

At this time, there is not a way to clear out the Budgets or set them back to $0 all at once.

You can use the "Copy" function at the end of each line that you need to clear and easily copy "0" to each of the months for that item.

Or you can edit the individual Budget lines to read the proper Budget value.