Here: [...]
This site claims that this is the only critical edition.
I have seen several other editions that seems reliable, but I am no expert in this field, so my opinion is not worth much presently.
In any case, for what it is worth, here is what the site says of this translation:
"The late Swami Kuvalayananda of revered memory and Shri R.G.Kokaje have been working on the preparation of this critical edition for some time; but its publication has been made possible only this year because the Government of India sanctioned a publication grant for which we are deeply grateful."
(Looks like Amazon deleted my link, but you can search easily enough for it.)
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