ZBrushCentral

ZBrush always on top?

Hello dear community!

For some time now, I’ve been having a problem with ZBrush going always on top - seemingly at random.
By that I mean it’s always covering over other windows, even when ZBrush is not the active window.
Since none of my coworkers seem to have that problem, I assume it’s a shortcut or something.
Does anyone know about any such shortcut within Zbrush? I doubt it’s a function of my OS (Win7x64pro)
Please help, it’s rather annoying and inconvenient.
Thank you kindly!