Additional Seat License Packs (10 Named User each) can be bought at the same price as the regular 10-User Seat License. You will indicate in the purchase order (PDF or online) that you wish to extend your current license. Please indicate also the full name which appears in the "Licensed for:" field of the edit-on Pro "Info/About" box. To retrieve this information press the "i" button within the editor's toolbar. In addition, please provide the ShareIt Ref. Nr. (if any), RealObjects invoice Nr. (if any) or the License order date.