JDownloader

How to recreate:
1. Enable Shutdown (I also checked Force, fwiw).
2. Dowonload something, let JD shutdown PC.
3. Restart PC, start JD.

Result:
Shutdown is enabled. That's, probably, something that should be disabled every time JD starts, like in JD 0.9x. It's worst if you don't enable the show button on toolbar option, as there's no visible indication unless you look at the tools menu.