Download the latest version here: http://sourceforge.net/projects/lisem/
openLISEM is an open source development (GNU GPL v2.0 licence). Using the compiled model or (parts of) its sourcode implies that you are familiar with the details of this licence.
OpenLISEM Hazard 2.0a is in pre-release for public review. Please see the related blog post on this website: https://blog.utwente.nl/lisem/2020/05/25/openlisem-hazard-2-0a-pre-release/