Need My Registration Key

Purchased the Webcam 7 Pro software long ago. Has been running for almost 10 years. Currently it is asking for registration credentials but I cannot find my registration key anywhere. Is there anyone that can help me with this issue? Might be I have no longer access to the original email. Much Appreciated

Write to support@netcamstudio.com with name and email under which it was registered and I can see if I find something.