Good news, I discovered the issue. A setting got accidently ticked that had temporarily disabled the sale of the game for a short period. I have now undone this and the expansion is available normally again. I likely would not have noticed this for some time without you letting me know so you have my appreciation. As mentioned, please feel free to email me for a complimentary copy of this (or any of my paid work really) if you would like one. Thanks again.