Here are the download links of the compressed archive, in the tar.gz, tar.bz2 and zip formats :
mreddesigner-v1.03.tar.gz
mreddesigner-v1.03.tar.bz2
mreddesigner-v1.03.zip
Here is a patched version by Nicolas Dufresne, allowing to load files automatically with the command line :
mreddesigner-v1.03-patched.tar.gz