@AstroSkipper @Multibooter
What is the processor model on your computers?
Fortunately, I have a lot of computers at my disposal.
I have dug the subject of the hidden window.
I installed VT Hash Check on my oldest desktop computer (Sempron 2800+ Socket A release in 2004).
By a double-click on the main executable, the configuration window is displayed.
But only the first time, as long as the configuration file "%Appdata%\Boredom Software\VT hash\Config.dat" is not created.
Afterwards, by a double-click on the main executable, a process is created but no window.
If I delete, move or rename the configuration file, a double-click on the main executable works again but only once.
Once the configuration file is created, you have to use the parameter --prefs to access the configuration window.
Can you confirm this?
I also installed the software on a fourth laptop (Core 2 Duo P8600 release in 2008)
On this laptop, the window of the settings is not hidden like on the laptops with Core i5 from the first (2010) and second (2011) generation that I'm using for testing VT Hash Check.
The problem doesn't exist with CPUs from 2006/2007 and up.
I can't do anything for that, the problem is linked to the architecture of the CPU.
Regards