In the past, if you made a change to the stack of a course unit, it required complex navigation to update the stack that the unit points to as well as then having to point your project to that new stack.
We have now released a new feature that is integrated with the publishing of a unit. You are asked whether you have made stack changes. If you have, then you can create either a new stack or a new stack version from the publish screen. You are also asked if you want to update the unit project to point to the newly created stack.
For more information on stack management, click here