App designer failed to open

When I try to open up the app designer, a new tab is created labeled app designer as normal, but the app designer window fails to show up. However, individual apps still is functional despite the fact that I cannot create or edit any apps. I have tried restarting MATLAB, restarting the computer, and even re-installed the MATLAB software, but nothing seems to work. Neither did the 'appdesigner' command or the Home>New>appdesigner route in MATLAB work at all. It had worked perfectly for days before it failed, and frankly it is strange that it should fail so suddenly.

[Walter Roberson]

Are you using R2016b on OS-X Sierra as was the case in the other thread you posted in?

This does not appear to be a problem for me on my OS-X Sierra system with R2016b

[Sittiprapa Isarangura]

If you currently use PC, try right click on taskbar and select 'Show windows staked'. You'll see the App designer again.

[w w]

Thanks @Sittiprapa Isarangura, I was trying to solve this problem for days. Did not know it is that easy.