When I'm trying to edit values that you've mentioned I get just no result at all. I'm very interested in details how did you do that
I digged around a bit more afterwards, and it seems that all presets are inside that file, so you might have modified the wrong one. The easiest way to do it properly is to rename your preset to something unique, and search it using the editor. After doing that, search the parameter you want to change (e.g. breastSize). What that will do is search for the next breastSize pattern after the name of the preset, which means you'll modify the parameter of that specific preset.
After that, launch the game and load the modified preset, and you should see the changes. Remember to save your current model in that preset before any editing if you have unsaved changes that you want to keep.
Important note, the game needs to be closed while editing the presets, otherwise the game might have already cached it and will not see the changes and will likely overwrite the file instead.