I do not have win, but I can report that the editor workd fine with win7. It's a bit tricky if you are not used to editors.
run the editor outside of the game, not during! It will come up and the saved game file that you want to edit will have to be browsed to. What I mean is click FILE and seach for the save game you want to edit (I suggest making a backup copy, or editing a spare save in case). So you need to navigate to the directory your game is in. If it is steam, go to the steam directory-> steamapps-> common ->arcanum -> save and select the save you have decided to edit. Usually, the most recent save.
THEN and this is important, they want you to type in exactly the NAME you are playing your character under. In my case it is Thorfinn (notice the capital F). Type it in exactly as it appears in-game, and then you are able to edit all sorts of stat using the tabs above.
Hope you get it working. It should work with win10,. I do not see why not. If the game itself runs fine, the editor will.
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