Here is link to bisagi 2.1 http://bizagi-process-modeler.soft32.com/free-download/index/version/353438/
Link to 1.5 https://www.box.com/files/1/f/980578261/1/f_8959984159
and link to xpdl that can be imported https://www.box.com/files/0/f/980578261/1/f_9060549933