PRESONUS StudioLive CS18AI Visual Quickstart Manual page 5

StudioLive CS18AI Visual Quick Start Guide
On the Firmware Update screen you'll see two sections. One for the CS18AI
and one for the RM mixer (this section will be empty if an RM mixer is not
connected).
Select Check for update in the CS18AI section.
9. The update process will take about a minute to complete. When
finished you will be prompted to power-cycle the controller.
10. Restart the CS18AI, revisit the Firmware Update screen in the
System Menu and observe the firmware version shown. The last
four digits of the firmware version reported there should match
the version of the files you downloaded for your controller.
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