If you experience flashing or disappearing menus when using PDF Studio with some Linux distributions, you can try one of the following two things to resolve the issue:

  1. Move the application to the upper left corner of the screen and then maximize the window.
  2. Switch to a non-maximized window of PDF Studio
This is a bug that happens to some applications, and the workarounds will have to be used until it is fixed on that end.
So far, we have gotten reports of this happening in Mint Cinnamon and Fedora.