For Demos: Copy the 30-digit demo code that pops up when you click "Demo" for any plugin on the downloads page.
For Purchases: Copy the 30-digit license code from your license confirmation email
For Subscriptions: No license code required! Look for "OG Kush Complete Bundle" in your iLok license manager, activate it, and go make some art!
Launch ilok license manager, sign in, then select Redeem Activation Code from the "licenses" menu.
Paste your 30-digit code into the popup box
When the license appears in your list of available licenses, drag it to any available iLok dongle or machine location you desire
Open your DAW and get to work!