@ccounting.com offers upgrades for Ezi Accounting, and Retail Man POS and Ezi Solution POS from Ezi Solution Systems. The current software licence will be validated before the upgraded licence key is supplied. Upgrades available are :-

Upgrade to Version 2.6 from Version 2.5 or earlier.
Add more users to a system to support more POS stations or Workstations
Upgrade from Ezi Accounting to Retail Man POS, or from Retail Man POS to Ezi Solution POS.

Version 2.6 of Retail Man POS and Ezi Accounting are being released.