Date Check: August 2, 2017 Forum Time.
Might be too early tho but I just checked the Bounty Portal
The said button that enables us to withdraw our Minexcoins to our wallets is still wasn't there.
But like I said, it's still too early; I would wait 'til the rest of the day.
Hopefully Devs would really make this day worth it for all bounty hunters and investors of Minexcoin.