Hmm true, a fair observation
Some info then, to help contextualize things: files in UTF format are simple to recognize because the first 3 characters on the file are "UTF" when you open it with notepad. These files have a tree-like structure with data placed on the "leafs" of the tree and this data varies according to the position on the tree and can be anything (can be TGA or DDS files if it's a texture, for instance, can be a set of x,y,z coordinates if it defines a ship hardpoint position, etc). The tool provides enough fuctionality to allow you to edit this data. Most likely you'll have to export the data to a file, edit it and import it into the tree again, but for more simple data structures you can use the Edit command (it's enough for hardpoint positions).