Try uninstalling JRE altogether, then re-install.
Download the files from here again and see if the .jar works.
Much obliged, I can now run 3DSForwarder.
However, on installing the .cia and trying to play the game, I get "Error 1 SD card template not found". Everything on 3DSForwarder is updated, the filenames are short and I dragged the original nds file from the sd card to 3DSForwarder so I'm not sure where I'm going wrong.
EDIT: False alarm, I've figured out what I was doing. Sorry and thanks a lot for your help!
Last edited by TheHague,