New PC installation of Mathcad 14.0, license.dat creation issue

I own a perpetual Mathcad 14.0 M020 Single User license purchased directly from PTC. The legacy MCLicense.exe utility authenticates to my PTC account, but the activation request fails with HTTP 403 Forbidden before a license.dat is generated. Since license.dat is never created, Mathcad reports that C:\Program Files (x86)\Mathcad 14\licenses\license.dat does not exist. Can someone generate a replacement license.dat or License Pack manually?

My old PC crashed so I am unable to locate the old file.