Airac 2307 install for Fenix not working

I have installed 2307 for my PMDG products but the Fenix (installed on the D: drive) will not install and gives me the message attached. I have been through all the associated folders and checked I am the owner and that Security is set to allow everything. I am at a loss as to what to do, I don’t even know how to roll back to 2306 ? Can anyone please help ?

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