SPIRIT 3.x is programmed in Java, so you can use different operating systems - provided
you have an applicable Java runtime engine. Using Windows as well as Linux the program is tested.
SPIRIT is free available observing GNU Public License. You have to fill in the following form, the data serves just as a basis for our statistics. After sending the particulars, you will receive immediately a link to an website, so you are able to get SPIRIT 3.7 (trial version) with additional installation information.
Thank you very much for your interest!