The problem still kinda persists, as I still find no option to get the password reset for the old account with Airdroid.
But after a few updates that followed for the app, I haven't seen any need for the airdroid specific account.
Im now able to sign in using the QR code/g+/fb.
Sometimes it takes a bit to detect and connect to the device, but that's okay.
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But seriously, despite being a product forum there's hardly any message from the admin/mods acknowledging us that our concerns are being worked or why it won't work, which just adds to the frustration and anger.