How to update the key in the document

[#1]

Hi All,

How to update the key in the document so that it can be opened in the end user system. I have created the one document and added in my desktop application. After compiling the same I am able to open it in my system but not been able to open in the other system. I know i need to update the license to that it can be opened in the other system. But let know how to update the same so that it can be opened.

This was the error which I got: