Firmware Versions on the CGX and CGX-L Series
CGX and CGX-L mounts have two sets of processors. There are processors in the hand control (HC) and there are processors in the base of the scope in a section known as the motor control (MC).
The CGX/CGX-L is provided with a NexStar+ hand control. Read this for step by step instructions on upgrading the hand control firmware.
Read this for step by step instructions on upgrading the motor control firmware.
Celestron has posted an official document detailing all firmware versions for the hand control and motor control:
Check back periodically for updates.
Use the Version option on the Utility menu.