Digital Editions 4.5 does not open a window, it runs hidden

Hello community,

I am trying to open my Adobe Digital Editions installed on Windows 7 Enterprise from my company but it does not work anymore. When I installed it few months ago it was working properly, now not any more.

I can see the SW opens from the task bar right clicking the icon, but when I click on the icon, the window slides out as it would open into another screen...that I don't have, btw. I also checked the multiple screen settings but nothing..

no window opens but the SW is running.

What can I do? apart from calling my IT who will not solve this problem I am pretty sure as it cannot be related to system settings.

Has anyone experienced the same?