Minor problem but still annoying 
If Studio is moved to a secondary display and later launched after a monitor configuration change (i.e. Remote Desktop or secondary display removed or resolution changed), Studio is not visible because the window state has been persisted with invalid coordinates.
GitHub desktop app has the same problem.
The work around is to delete %appdata%/studio/window-state.json (or %appdata%/studio-unstable/window-state.json for the unstable version) before you launch studio.
Thanks,
Ian