When I use F11 for full screen mode on my latest Windows 10 laptop, it 'overfills' the screen and all the controls are misaligned in the download client.
If I try to click a button, the actual active area is above where it appears onscreen. You will note that some of the controls (eg. choosing battle type and entering a battle) are off the bottom of the screenshot.
I can work using the maximised client (so I still see Windows taskbar etc.) but would prefer proper full screen.
The Display properties tells me I am using 1920 x 1080 resolution
Customer support service by UserEcho