Hello.

manual

Prod. State = A1,A2 (devices with the CUD1 electronics board, version C98043-A7001-L1-xx):

It is only permissible to load software versions 1.xx and 2.xx.

Prod. State = A3 (devices with the CUD1 electronics board, version C98043-A7001-L2-xx):

It is only permissible to load software versions 3.xx.

You can't change the product state of CUD1, you can only upgrade/downgrade the software of CUD1 according to the mentioned restrictions.

Hello.

It is described in the manual, chapter 13.1. FW is here.