We are on VA 8.0.0, developing on Windows XP mostly.
I discovered a problem in that I couldn't visual edit (#abtBrowse) several of our visual classes. Then a teammate pointed out the window is kind of stuck minimized in the task bar, and you can select it and click Maximize and then see it. But a person unfamiliar with this workaround might panic as I had.
We now believe what happened is that team members using PCs with two monitors saved the part on their secondary monitor. When they re-open the part, it appears on their second monitor. But for me with one monitor, the window comes up minimized.
I thought others out there might hit the problem, so posted here. Not sure if Instantiations could fix it.