I can't say if any of the 25 year old savegame editors work, or if they ever worked, as I never used them.
Probably not what you're hoping for, but as far as I know the only way to accomplish what you desire is to restore from a saved game before the levelup where you took the unwanted perk.
If you're restarting, many people overlook the modified bunker maps available in the "Bonus" folder of the mod download, which contain in-game usable items to help you modify your characters to whatever precise specifications you desire.
Endocore
joined
Interests: Modding old games such as Fallout, Fallout 2, Fallout Tactics, Jagged Alliance 2/UB, Panzer/Pacific General.