Installing and Uninstalling the AirPOS POS Application on Windows.
Having completed your initial setup login to your backoffice here https://backoffice.airpointofsale.com/ using the login credentials (Username & Password) you used to create the account. You'll be brought to your backoffice dashboard which looks like the screen shot below where you'll see a button 'Available on Windows'. Tap or click on that to download the POS application and sign in to it with your existing account username and password.
Alternatively you can tap on POS from the left margin and you'll see a link to 'Download Desktop Application' as shown below.
To Uninstall the AirPOS POS Application you'll need to open your Windows Control Panel.
Click on 'Programs' to get to 'Programs & Features'.
When you click on the link to 'Uninstall a program' the screen will refresh with a list of installed programs as seen below.
Click on AirPOS which will be at or near the top of your list and Windows will uninstall AirPOS.