Where did you try?

Here in x5 top right, next to your name pulldown and then go to licences and fill in your licence number.

after that you can download the version of x5 in the same pulldown.

-Assuming you got a correct licence nr. for a website X5 version.

Hi Mitch, 

I am sorry for this issue. 

Please post a screenshot of the error message you get, and please tell me step by step what you do. In this way, I can provide you with more information about how to solve the issue. 

Thanks! Kind regards.