The current firmware version is 5.2.
You can check your current firmware version at any time by holding down the three buttons shown below in red:
While these three buttons are held down, the firmware version will be indicated on the bottom encoder LED rings on both mixer channels.
The left LED ring indicates the number before the decimal point, and the right LED ring indicates the number after the decimal point. Include both red and blue LED’s when counting.
For example, to indicate version 5.2, five LED’s will light up on the left ring, and two LED’s will light up on the right ring.
Note: If you think you have 4.1, you most likely have 5.2. Make sure to count both red and blue LEDs.