I experience little bug here. :| On "Remove Grey" mode, after processing the fixed part is a partly in rectangle shape. I tested it with few images, it appears only on some particular of them. No matter is it big or small picture. I have 4 GB ram. I'm pretty sure it is the processing algo. :| Maybe it's the demo limitation?
Otherwise I think it's a great software. Keep developing it.
Oh, yeah, one more thing, ignore this guy Legal Eagle, he is posting non argumented bullshits for my software also. :-)