If you have subscribed to XMind for Mobile or Bundle, you can unlock the full version after you log into your account on the application.
Please make sure that the account is the one you used to purchase the subscription.
If you was purchased from App Store and failed to unlock the full version, you can restore purchase on the device where you bought the subscription.
Please fellow these steps to restore purchase.
1) Launch XMind for iOS;
2) Enter「Settings」->「About us」;
3) Click「Current Version」three times to restore purchase;
4) Sign in with your XMind account on the application to see if you can unlock the full version.
If it cannot work, please send us feedback from XMind for iOS.