Purchased Change Domain – as it didnt work on previouse one

Hello,
a few weeks ago i wrote here as i had a problem with the payed version as well as i didn get support – BTW: still waiting for that support…. Now I want to install this on another website – as on prevouse site it just do not work and i was never able to use this plugin. As I setup another domain i would like to install this on that new website and tried to install it there but got an error due invalid license code. How can I install this on another domain?
Maybe you can change men the license to another domain so I havn’t trash my money i’ve pay.
Many thanks

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