From PostgreSQL to SQLServer (No User/Pass)

Some of you MAY be able to crack a really tough nut...

I have to move all the data from a PostgreSQL (9.1 - Windows) database to SQL Server because the company I am contracting with is upgrading the old program with a newer .NET version.

The real nut is that the User/Password for Postgres are baked in the old program... Of course the guy who wrote it is gone. No source code or any way to contact him. (Smaaaart)

I was able to obtain the WHOLE Postgres directory (Bin, Data... The whole thing) and I hope it can be done.

Is there a way out of this mess, or should I just blow the contract and look for something else?

THANK YOU!