You can now easily move budgets that you have created in a scenario to the base scenario and your forecast will update accordingly.

In fact, now you can move any of your budgets between any of your scenarios.

When you are in the scenario simply click into the budget that you would like to move and you will see an arrow against the budget name.

Clicking this arrow will move the budget out of the scenario and into the Base. Similarly you will be able to click into any base budget and move the budget into a scenario.