can not blur finder window
I think what is meant here is that if the currently focused app/window is Finder, Blurred won't dim the other windows.
Finder is a particularly relevant app to support as often it'll be the focused app but have no window shown which leads you to believe the frontmost visible window is the focused window. This is confusing and frustrating when you try to type or press shortcuts and nothing happens.
I second this. So far in my brief use of the app, it seems to do it's job perfectly, except when Finder is the active application, then no other windows are blurred.
+100
@dwarvesf Can we get this at least fixed? It works everywhere...except Finder.