I installed the latest lts ubuntu, 16.04 for my development environment, but the Heidi has the following problem: Installed successfully, app icon appeared on the desktop, but when I start the app, no app window appears, only on the menubar is it's icon, that the program possibly running. And I can close Heidi, right clicking on the icon in unity app launcher, and selecting exit. It's a laptop, and isn't connected any outer monitor to this system. Heidi was working well on 14.04, 15.10 by the way, I've made everything at install as earlier.
Any advice what to check? Thanks