Cubase 8.0.5 not exiting cleanly

Windows 8.1, Cubase 8.0.5 64-bit, with Synergy running to share mouse and keyboard across networked systems.

Startup is fine, connects to Steinberg Connect. Close the Steinberg Hub without creating a project. Synergy is disabled while Cubase is in-process.

Close cubase via the exit button (top right X)… and it hangs, Task Manager says it’s not responding. I can close it explicitly via Task Manager but that’s the only way I can exit.

I’m not sure (yet) if synergy is the cause; I can disable it and try (but it’s worked in 8.0 with synergy.) But it’s annoying to be unable to exit cubase cleanly.