The license is an owned license, with unlimited clients, meaning no further payments to Modernbill are necessary, and there is no limit to the amount of clients you can host. The license grants access to all of the latest versions of Modernbill (only Modernbill, no other products); meaning as new version are released, as long as your support contract is current (you have to renew your support after six months) you can get the latest version for free.
So in a nutshell:
- No more payments to Modernbill (not including support)
- Unlimited clients
- Free support and new Modernbill versions for six months
- After six months, support must be renewed in order to continue receiving support and to get new versions of Modernbill