Upgrading to a Higher Product Edition

You own licenses of the AllSync Home or Professional Edition and want to upgrade them to a higher product edition? You can order an upgrade to a higher product edition at the differential in price between the two editions:

You own one AllSync Home Edition license (20 Euro) and want to upgrade to the Business Edition (60 Euro). The total upgrade price in this case is 40 Euro.
You own 5 AllSync Professional Edition licenses (135 Euro) and want to upgrade to the Business Edition (185 Euro). The total upgrade price in this case is 50 Euro.