the New Version of 3GX V3.1 is the latest update from Align. It is meant to stabilise the take off and landing quirkiness of the Version 3.0.
NOTE: you will have to run your DIR mode setup again before flying after any gyro Firmware up grade
I test flew it after resetting the DIR modes and it does seem a lot more stable.
see My other vids on setting up DIR and also importantly the 2 pots on the top of the Gyro .... make sure you set them up at 12 oclock and then re - dial them in ... I like it at about 105 each.....