When you select the application, select the drive and click Install, and then Finish.
Loading Mathcad and get to the Licensing Wizard.
Choose "Configure the product to use an existing license," and click Next
In the new window, put a check in front of "PTC MATHCAD PRIME 3.0", and selects the line with the "File" and click on the Browse button. Find the license file (license file) in the folder from an archive "../ADOBE/MathCAD.mst" and click Open.