AJA Kona 4 Installation & Operation Manual page 67

Select Standard Mode and click install to erase 4K firmware and load the Standard Mode.
Note the Installation message shown below.
Figure 53. Firmware Changeover to 2K
You will be required to power-cycle your computer to finish the changeover.
Figure 54. Update Success Message with Shut Down Button
KONA v12.3 67 www.aja.com