Applying the Unlocker
If you select a feature which requires the EZ-GUI Unlocker, you will be asked if you want to unlock. If you say yes, you’ll go through the usual Google Play Store in-app purchase process – confirming the price and so on – and then taken to the Play Store to install the EZ-GUI Unlocker.
Once the Unlocker app is installed, you can’t open it – you don’t need to. Just return to MultiWii EZ-GUI and select a locked feature again. You’ll get the “Do you want to unlock” question once more – but when you say yes this time, you’ll be taken to the unlock screen. Select Unlock there, and you’re done.
Note: Applying the Unlocker unlocks all locked features, not just the one you select.