Well, when I tried to update it using Patch My PC, it didn't update. I think that may be because Patch My PC found I already had the installer. Not sure if that was the issue or not.
But when I updated it from the Tree Size website, it did update to version 4.6.1.509, and now Patch My PC no longer shows there is an update.
But when I updated it from the Tree Size website, it did update to version 4.6.1.509, and now Patch My PC no longer shows there is an update.