This is a problem with the application as the printer box should disappear once you have clicked Print. Access the settings of the application and disable any Always on Top. Most likely this is the settings that needs to be configured to get rid of the printing window. Additionally, set the compatibility of the application to Windows XP. Go to executable application and right click it then select Properties > Compatibility > Windows XP Service Pack 3. Accept the changes, launch the software again and initiate a printing operation.