Spout Receiver not asking for Sender

[TereBin]

Hello. I am new to Unity, so it might be very simple question...
but I can't find the answers. so I had to ask here.

I have loaded your demo and it worked, but when I tried to create the same thing by copying files from demo, it does not work.
I also followed the General Setup and Receiving textures instructions in ReadMe.txt

Problem is...
My Spout Receiver script is aksing for Sharing Name, and there is no Select sender.
how can I solve this?
(Maybe I forgot to move important file from demo project? I copied - NativeSpoutPlugin.dll, Spout.cs, SpoutReceiver.cs and TextureInfo.cs)

this is how it looks on my project

thank you in advance!

[TereBin]

Oh... I just realised, I have to ask one more question. does it not work on 2D project?
Because I created this project by creating empty 2D project...