How do I install hammock?
Download a release (Hammock_v_1.2.0.7z) from https://github.com/krejciadam/hammock/releases
Unzip
To run the first example:

cd /your_path/Hammock_v_1.2.0/examples/MUSI/
java -jar ../../dist/Hammock.jar full -i musi.fa

As mentioned in the comments, it's in the manual and any further issues need more information (errors etc).