It should be a fully function program, but you do need to create the proper environment.
AFAIK the zip "folders" in NT are not folders at all, but just files. The Windows explorer has special support for such files and displays them as though they were folders. If you try to pass a file within such a pseudo folder to some program (such as the execute command) that file is extracted into a temporary location and that copy is then passed. Files in such a pseudo folder are not visible to the file system.
So you need to extract the contents of that zip file into a folder (you can do that with the explorer copy function, just drag and drop). You should have the Mathcad file and the subfolder in a folder, and the XLS files in the subfolder. The only path you should have to change is the name of the subfolder with the data files, and that only if you change it from what is in the distribution.
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� � � � Tom Gutman