I don't think there will be a workaround other than the provider of the ODBC driver (openlink) will proivde you a version that you can install on Windows 7 - but I doubt they will.
Progess 7 is a technology from the beginning of the 1990s - nearly 20 years old - it was designed to run on Windows 3.1. IIRC, Windows 3.1 was 16 Bits.
Regards, RealHeavyDude.