It should be noted that this will possibly not work if you are running a translated version of DVD Profiler.
Initially I tried sending Alt-F4 for closing down Profiler. If this had worked, it would have worked regardless of translation. Unfortunately I could not get that to work.

So, at least for now, this program relies on Alt-f opening the File menu, then up arrow and enter, to select the last menuitem in the File menu, which should be Exit DVD Profiler.

If you're using the French translation, you're in luck. The French translator has chosen Fichier, so Alt-f will still work. Italian uses File, Norwegian uses Fil, Portugese uses Fisherio, Danish uses Filer. So all those should work.

In the Spanish translation it's Archivo, so that would have required an Alt-a. The Dutch translation uses Bestand,. Finnish uses Tiedosto, Swedish uses Arkiv (my fault). So those would require a configurable option in DvdpRebootGuard.

The German translation, I'm sorry to say, has no shortcut keys at all, so you guys are definitely out of luck, unless someone updates that translation. I haven't checked all other translations.

If anyone who uses a translation that requires something else than Alt-f wants to use this program, please let me know. I can add a configurable setting without too much work, but I'm not going to do it unless someone actually has a use for it.

And if anyone wonders - No, I am not using the Swedish translation myself, even though I am the one who created it.

EDIT: I only checked the translations that came with the latest Profiler release. There could be other translations that differ from the above.

What language do you hack in?

Looks like quite easy to restore window if using 'higher' level language.

if (MyForm.WindowState == FormWindowState.Minimized)
{
    MyForm.WindowState = FormWindowState.Normal;
}

Opps, my bad.
Anyway here is one way to get what you want, but may not be what you want

https://social.msdn.microsoft.com/Forums/vstudio/en-US/4c4f60ce-3573-433d-994e-9c17f95187f0/finding-which-applications-and-services-are-listed-in-the-system-tray.

I have noticed that something has changed in Windows 10 recently. When I restart Windows it no longer takes down DVD Profiler, but insteads hangs and waits for Profiler to exit. So I guess that DvdpRebootGuard no longer fills any function.