I uninstalled and reinstalled Mathcad, or applied a software update. Do I need a new license file?
Floating and registered-user licenses are unaffected when you uninstall and reinstall Mathcad, or apply a software update. If you have customized your options file (ptc.opt) to include or exclude a specific workstation, update the file accordingly. For more information on modifying the options file, see the Administrator’s Guide. For all other license types – node-locked, home-use, and Single-user – you must request a new license file if you have installed Mathcad to a new workstation or manually deleted your license file.