I installed the basic package

and the DAO packages but was given an error message

that windows did not know how to open the mind map. I upgraded to the MAP version and had the same results. I followed the installation instructions very carefully, with no error messages. I also deleted everything and went through the installation again, following all the steps in proper order.
Right now, I have this great program installed but I can't get it running so I can use it!
What did I do wrong? What must I do to use the program?
I am running Windows Vista Ultimate on a new Compaq laptop PC with 3 Gb. memory