The link to the program is listed in the original Store
entry:
http://store.neurosky.com/products/mindstream
It brings you to a product description that explains the Github
code here:
https://github.com/ericblue/MindStream
So the way this program is distributed, per it's specific license, is as code that you will need to compile yourself. There's information from the Github page itself. Here is what it says:
[Installation]
Currently there is no installer. You can download the source
and/or binary distribution:
the primary executable (mindstream.jar) is located in the dist
directory. There are helper scripts to execute loading the app
(mindstream.sh for Linux/Mac and mindstream.bat for Windows). Both
scripts simply execute ( java -Djava.ext.dirs=lib -jar
dist/mindstream.jar).