Thank you Garret & Michael.

Turned out to be a couple of things I had missed after purchasing the whole Chilkat bundle;

Firstly there is - in addition to the "ComUnlockComponent" function - a "ComUnlockBundle" message that is to be used for the whole suite, and it is to be applied to a global "cComChilkatGlobal" object and not to an individual class object (like cComChilkatCrypt2).

Secondly I had mixed up my unlock codes and was trying to use my old one for the email component to unlock the whole bundle...

P.S. Just as Garret said it is difficult to find the very essential "ComLastErrorText" message in the docs, and it really helped using that.

Problem solved!