I just downloaded and installed this latest Thumbsplus build. I've noticed that when I have Thumbsplus running, the icon in the system tray does not show the Thumbsplus icon as previous builds did. See attached screen dump, where I have the mouse hovering over the system tray icon for ThumbsPlus. The Start menu and desktop icons for Thumbsplus show the correct icon, and I haven't found any problems with the app, it's just the system tray for the running app that is blank.
OS is Windows 10 x64 v1803 build 17134.
Nick