Hi and welcome to the forum

I guess you own a aquero and want to have an english menu, right?

If so start the aquasuite and click on Sprache in the menu and select english. After this step you click an aquaero and select flash firmware. Choose the file 'aquaero firmware 410a.afd4' and open it.
Your aqauero will show a new screen. Press and hold the set button for around 2-3 seconds until the flasing process starts. After flashing you need to turn off the computer and start it again.

Now you should have an english menu in your aquaero