length(Sys​tem.Diagno​stics.Proc​ess.GetPro​cessesByNa​me()) always 1

Is detailed in the Title, in my code

n = 'photoshop' (used as example)

When Photoshop is closed:

System.Diagnostics.Process.GetProcessesByName(n)

Length: 0

...

System.Diagnostics.Process.GetProcessesByName('photoshop')

Length: 0

...

length(System.Diagnostics.Process.GetProcessesByName(n))

ans = 1

length(System.Diagnostics.Process.GetProcessesByName('photoshop'))

ans = 1

If Photoshop is open, all values listed change to / stay 1.

Honestly I'm utterly stuck. My main goal was to check whether a specific .exe was running. Maybe this code snippet isn't even neccessary but this seemed the most useful for me at this point. Any help is appreciated!