purchased license key but in update the form is one character shorter..

Hey,

Would be great to get some help. I purchased rekordbox and have the license key. When I upgraded to the latest version 4.2.0 I first have the trial version. When I want to put my license key in weirdly enough the form is one character shorter than my license key. 

I have copied pasted, manually done it but wont work. 

thanks for help, driving me nuts. 

Cheers,

Victor