Registry editing programs are only as good as the user.
You have to keep in mind, the registry is a CRITICAL database of your system, and hacking "Keys" around is not a good idea, if you are unsure about what you're doing.
RegEdit, was a Microsoft offering from some years past, and you can still find sites offering a download by using a search engine. This is my preferred Editor, as I think it is the most "gentle" of the breed.
RegSeeker is a popular choice here, although I did use it to do some serious cleaning on a machine and it almost trashed it. It was only my knowledge of possible recovery solutions that dug me out of a hole, so that one, use with care!
Finally, if your nervous or unsure about what your doing, leave well alone.