There are two major changes that needs some introduction. The first one is that the profiler_output_name and trace_output_name settings no longer accept simple values such as "crc32".
They now accept different format specifiers (think printf style). The documentation will be updated soon with this new information. You can grab this updated version directly from their site or check out some of the documentation and some of the other news about the project. Windows builds (older version) of the project are also available.