The XirusCAD RE Commercial Perpetual License grants you the right to install and use the Software for an unlimited period of time on the number of Devices indicated on the License Certificate. The unique License Key will be sent to you by e-mail.Requirements: XirusCAD RE is available for Windows. The same License Key works for Rhino 6 and 5 (64-bit) as well. Note that for Rhino 6 compatibility, version 6.12 or higher needs to be installed.