Open Photomatix to process any image and your tone mapping settings from your last image should still be up... just scroll to the bottom to the "presets" drop down and select save.
Could you please provide a more detailed explanation?
I have a tiff file that I outputed from Photomatix about 6 months ago. I can open the tiff file in Photomatix using File > Open... but then what? At this point, there is no access to any "preset" information -- at least not that I can see.