Glad I could help. If VirusTotal's results are mainly green ticks, then the exe is likely to be safe. But it has to be majority green, like 90% or more. Any less and I'd be wary.
Here's the VirusTotal result of Dual Monitor Tool's setup app:
And here's the installed app (DMT.exe):
And here's the installed DualWallpaper.exe results:
All three are 100% green ticks with NO malware detected. I'd say it's safe. :)