This is extremely annoying.
I just installed C7.5.4 fresh recently on my new OS drive (win 7 x64). When I click outside Cubase the plugins that were open disappear. Even media bay, etc. disappears. This makes drag and drop practically impossible, to another VST.
Please let me know what the solution is! It used to work fine in this exact computer before the clean install. I have a new graphics card with latest drivers.