Unfortunately, there is no public information related to the availability of the software and its EOL date. I checked various HP forums, and users said that for version 6.15/6.10 the EOL date was somewhere around 2012. If it's true, then the version above is long discontinued/unsupported.
I advise getting in touch with the HP developers, because they can provide exact dates and information for this software: http://www8.hp.com/us/en/hpe/contact/contact.html
