Exporting from Suretak to Project

I’ve a stubborn owner who insists on tracking a contract in Project instead of Suretrak, which is the software I use. So I need to transfer my schedule; I saved it as MPX, but when I open it again, al relationships appear as finish to start, so it doen`t work. Besides, only old versions of MSProject accept the MPX format. Is there any other way to do this properly? Thanks