I just received my new license file this AM. I copied it from the email to the folder that it normally looks for it at. That is in your documents under Partmaster.
Then I clicked on Help in Cam. License manager.
Then top left, License. Then install license file.
I haven't had any issues with it.
I find that the email support is good and my preferred method of communication. That way I have a record of the conversation for future use if needed.
I am certain they will get you fixed up though. Support has always been good from them for me.
What kind of setup are you running. Mine is Win 7 64 Bit.