When you have bought an Smart license a lot more settings will be available under your device configuration and within sensor sharing.  

Keep your license key private (!)

Adding the license to your account

The smart+ license will be send out by email to all the company admins.

Follow the link in the email and active the license. Click Add License and enter your license code into the next field:

You can find the license in your account within the eos dashboard: 

Now navigate to the Bever app, to your already made network and found devices. 

Make sure no device is selected. Devices that are previously found will show up in the overview later. 

Click the tree dots -> licenses

And here you can assign it to your selected device(s):

Lastly, click on the device(s) you want to make Smart+ and it will share the license with the device:

All done.. you just made you device even smarter!