We stopped updating the version of Dynamo for Mathematica 4/5 in April 2007 at version 0.1.5, but here are the workbooks just in case.
Please cite this group of workbooks as
W. H. Sandholm and E. Dokumaci (2007). Dynamo: Phase Diagrams for Evolutionary Dynamics, version 0.1.5. http://www.ssc.wisc.edu/~whs/dynamo.