Default Wallpaper on Every Reboot

Great until you reboot, then your custom wallpaper is gone, and you’re back to the default wallpaper. Using it on both an old Yosemite install and a fresh El Cap install; on both systems, on every reboot, I have to launch this app, find the wallpaper, set it up again, and click Save. Why this thing can’t create a couple of temporary files and set them through OS X’s wallpaper chooser, I have no idea. Or why it can’t launch on startup automatically and restore the wallpaper is beyond me. It makes using this nice app a real bother.

FuzzplugJones about Multi Monitor Wallpaper, v1.50