Early From "Open With.. " window I run the SignatureTool.jar but it was not working but now running from Command line as per your given details it is working fine
I am having a similar problem and I used your technique to open the file manually... everything is fine until I move my mouse to create random key or what ever after that i get an error message that tell me that the .csi file doesn't exist... obviously it's not finding the file...is there a certain place I should put the file so that it will find it?