License still showing invalid even after the license transfer

Have you checked here:

https://community.ptc.com/t5/Mathcad-Installation/All-About-Mathcad-Software-Installation/m-p/706433#M26

for a potential solution to your problem?

Otherwise describe your problem with a bit more detail, like:

- what did you do.

- what went OK.

- what went wrong.

Success!
Luc