MBM5 is no longer updated, so if you have a newer MB, it won't be properly setup. It may still work fine with choosing a MB from the list that is close to yours (same Brand, same chipset if possible).
You might be better off using Speedfan though. I have both setup for my PC, and I do prefer MBM5. But I realize that with my next MB upgrade I will most likely need to start using Speedfan only.