Thanks Meridian!
Something else I noticed, when changing the game release under mods, from ufo, tftd, or x-com files. each version doesn't retain it's own copy of setting under the advanced options.
I know some mods, like twots and x-com files specifically sets, changes and locks out options like, x-com files sets explosion radius to 2, but when I go back to tftd or ufo, those setting stay changed. It would be nice to have the advanced setting stored and remembered for each game type.