premium module disappeared

hi folks,
I bought easyreservations premium in 2014. I ceased my duties as site admin in 2015 and am now back on board. Sometime between when i left and when i returned, the premium module that was bought has disappeared and the developer is unwilling to provide me with it unless i pay for it again. Our non-profit simply cant afford it. Would anyone be willing to share their version with me? I can show my receipt to prove my purchase.

The page I need help with: [log in to see the link]