Upgrading trial exchange to collateralized with XHT

I have made a trial exchange and after few weeks I created a new exchange and decided to collateralize it with HollaEx token (XHT).

How do I now update the previous activation code that I have set with the new one for my new exchange without going through the whole process of creating an exchange again?

This has be recently answered here: How to collateralize an exchange? - #2 by Simon