Do NOT buy, do not make the same mistake I did.
If you wish to use the product on a new host (which might be the same computer, after installing a different operating system or platform), you will need a new license. The license is not tied to physical hardware like a network card or HD serial number. Microfocus will give you a new license file only if you pay them continuously for maintenance. You won't be able to use a product you paid for in full in the past.
I ordered the product at this site, and currently cannot use the outdated software, which fits my needs, while the current version is incompatible with the compiler. This is the reply I got:
"Thank you for contacting Micro Focus Supportline.
We understand that you wish to rehost your license file. However, your serial number has expired maintenance since (...). Your account manager has been contacted so she may get in touch with you for the renewal process."