Adtec digital YUV2QAM (version 01.02.01) Manual - Manual (Page 29)

Once the upload has completed the you can close the window.
The firmware you just uploaded will appear as “Available Firmware Versions“. Click the
install button.
You will be prompted “Are you sure that you want to install the selected version”.
Click to install the firmware package.
You will see the following dialogue box while the firmware package is being extracted /
installed: