Upgrading to Mathcad 15 Professional (single user), Professor, and University (student) edition.
There are 3 basic steps to licensing your copy of Mathcad:
1. Install Mathcad software on your workstation.
2. Request a license file from PTC and save to your workstation.
3. Tell Mathcad where your license file has been saved on your workstation.
The attached PDF tells you how to install Mathcad 15 and request your license key.
The directions for a single user are woeful. The only license option for an online installation is FLEXnet, which may not be appropriate. Try and register as a new user? Not possible without a customer number, an order number and more, none of which you have if trying to do this online. Perfect Catch 22. Do I need a disk? Cannot get a sales rep on the phone. No answer; I have some old Mathcad files that I would like to access again, but ptc is the most difficult company with which I have ever dealt. No phone service, but reams of irrelevant documents.