VMA archive restore outside of Proxmox

Hi,

After reading the (sparse) documentation in the wiki and in repository as well as a couple of threads here in there forum, a couple of thrilling questions raised in my mind:

• Is it possible and how do you restore VMA archives outside, I mean without, a recent PVE install ?
• Is there a GUI/CLI option to fallback to old XXth century tar backup method ?

Thank you in advance for your enlightenments
Bests