Installed Teamviewer Host (unattended access) and now Windows 7 doesn't sleep.

[fixingstill]

Installed Teamviewer Host (unattended access) v8.0.16642 and now Windows 7 doesn't sleep.
It used to sleep.
I did a "powercfg -energy" and generated a energy-report.html that says:
System Availability Requests:System Required Request
The program has made a request to prevent the system from automatically entering sleep.
Requesting Process   \Device\HarddiskVolume2\Program Files (x86)\TeamViewer\Version8\TeamViewer_Desktop.exe

My other PCs work. Just this one doesn't sleep. Any clue?