Where Do I Find Visual Composer License Key?

We provide license key of Visual Composer in download package, you can find it in obtheme-montanaVisual Composer (We bought extended license of this plugin) but current have note solution for activate with this plugin. license key only can activate 1 time 🙁
We created new ticket on http://support.wpbakery.com/ and here is the answer from developer of Visual Composer.