Update your post to include full system hardware specs and OS information.
Also regarding ""l but i obviously want the newer driver" - agree and that is true for most people.
However, the newer driver may be buggy or corrupted. Perhaps mis-configured - double check everything per the installation instructions.
Could be some change in supported products was made and that is why the fans do not work any more with the newer version.
Try manually downloading the driver again, reinstall, and reconfigure. Any driver problems may have just been quietly fixed in the meantime.
If reinstalling the newer driver does not work, and the old driver works as it should then just use that older version driver until the next version is...