There is no OpenSpan version 7.2. You may view the Build Notes for version 7.1 here. Pega Robotics 8.0 supports Windows 8.1 and Windows 10 and has a number of other enhancements. To see these please read the Build Notes. The support.openspan.com portal has been decommissioned and now routes you to PDN, which is your source for all documentation. A good starting place is this page. To download the software, open a Media Request SR.