Shortly after I updated to WinPatrol V33.6.2015.16, I noticed that after Windows restart that a few tray items were missing. After a couple of days, I disabled Avast self defense and did a system restore successfully. All removed items were restored, except that WinPatrol had rolled back to the previous version. It was the only program that I had updated after the restore point. Not finding anything in my searches about a problem with WinPatrol V33.6.2015.16, I reinstalled. Immediately, I noticed that startup items were missing.
The ones I really missed were WinPrivacy Tray App and Synaptics Enhancements, which I restored by using WinPatrol's Add at the bottom of the Startup tab. None of the removed items were showing in Options/View history, so there was no other recourse. I believe that I will do another system restore after removing WinPatrol V33.6.2015.16 and install the latest version.