To use the black glass app and have it start each time your computer starts you need to stick the app inside your start up folder.
the easyiest way of doing this is to open the blackglass app folder in your downloads right click the .exe and create a shortcut for it.
Then go to your startmenu find the startup folder and drag that shortcut into it.
The nice thing about blackglass is you can set it to glass what programs you want to be glassed in the .ini using notepad.
Myself I only glass explorer.exe
But to add other programs or more section of the OS just open .ini file with notepad an edit what you want glassed.