Downgrading

How can I go back to a previous version of the game? The newest patch 11/24 completely broke the A320 autopilot. This is dumb. Can we test things before releasing it to consumers who paid $60 plus for this? The one plane I enjoy flying (since the 747 doesn’t work right either, and the CJ jet has fuel issues) I have to fly manually now. So much for long flights without increasing the sim rate or jumping to the end.