Did I mess up good and proper?

I cjanged my licence domain and started using Maian Pal on another website.
On one part I get the proverbial red homepage with ERR CODE (3) in big letters in the top right (I did replace my licence.lic code, that's when the trouble started, while on the other part of the site, everything works perfectly, but I started with a fresh install there.

Is there a way I can make both of them work correctly?
Thanks in advance.
BTW, I found nothing in the help, the docs or the FAQs.
Never mind,
I managed to find a solution and resolve the problem myself.
Thank goodness for a bit of MySQL and PHPMyAdmin knowledge.