As far as I know, there's a save game editor on Nexus, that might help you. Possibly. But I personally think it's not very user friendly, if you're not a computer guru, I can't figure out the easiest things with it, like changing the character's name for example. You click on the name and it changes to the "Health" value, another click changes it to "energy" and so on (right clicks shift back). Dunno how to operate it properly. A save game editor (especially one designed for clearing characters from custom stuff, as reads the description of the tool on the Nexus page) should be easy to use, this one is not. At least not for me, maybe you'll have more luck, better skills to use it and so on.