How to register purchase code?
You can found the register screen in: GoodLayers > Getting Starts / Import.
The purchase code can be found here: http://support.goodlayers.com/purchasecode.png.
How to revoke the purchase code
You can revoke your licenses by creating the account in our License Center: https://goodlayers.com/licenses/.
After that, add a purchase code in the register box:
Then you will be able to revoke license(s) from there.