Plesk Billing also now no longer has an owned option.
This kind of stinks, since depending on product stability and flexibility you can end up paying less with owned software than with leased.
(Though if you just want to test it out, or use it for a small number of clients, their 10-user demo license is apparently free. I don't know how long that demo license lasts...but it still doesn't give me any option to own rather than lease.)