Well I think I found the issue. The program uses a custom version of the TRMM Radar Software Library (RSL) for accessing Level-II radar files. AWeather's version that come's with the latest release is like 4 versions out of date. The developer uploaded an updated version of the RSL in 2017 to go with the latest version from the weather service. Now I just have to find out a way to patch the old program and hope it works. The good news is that the developer still has an active email so maybe he's willing to resurrect the project.