At the moment this is the same exact version as the one on gumroad, so there's no reason to transfer ownership. If I were to update it, I'd look into it, but there's no clean and easy way to do it.
I'll never force you to rebuy. If I DID update it, I would only do so if I found a way to transfer ownership from Gumroad to here. Gumroad also will continue to let you access the files, you can access them via the receipt or your gumroad library
