Turn Computer off, reboot, log off, hibernate or standby and disable the prevent feature in Don't Sleep !
When you click one of the options via To-Tray menu or main menu (... see Image-1 Arrow-1)
then will Don't Sleep disable Blocking feature (... see Image-1 Arrow-2) and for example Restart the Computer.
Please use Don't Sleep ver. at 3.63
FAQ 5: Updated on: November 2th 2014 22:02