Possible to migrate my account to Steam?

When I bought TUG on Humble Bundle, it had presumably not yet come out on Steam. I see now that it is on Steam; am I able to migrate my copy so it lives with the rest of the majority of my gaming library?
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@jenksy it's not possible to migrate it to a Steam version, but Steam does allow you to add non-Steam games which are installed on your system, to your Steam library list. You can do this by clicking the "+ Add A Game" menu in the bottom left of your Steam client and selecting the "Add A Non-Steam Game" option.