If restoring your purchase does not work even though you are logged in with the correct account, there are two possible reasons:
1) If you are using an Android device, the data for Google Play purchases on the device may be out of date. This is a common problem, but you can fix it. First, close our app completely via the “open apps” screen, then go to the list of apps installed on your device. Search for “Google Play Store” and “Google Play Services” and delete the cached data for both. If you now open our app, you should be able to restore your purchase.
2) You may have purchased an earlier version of the app but are trying to use the newer one. In the past, we have changed most of our apps from a directly paid version to a free trial version with in-app purchase of the full version. Unfortunately, it was not possible to automatically convert existing users, as the stores considered the app to be a completely new app. We are very sorry for this inconvenience! If this problem applies to you, please send us an email with a copy of your purchase confirmation ( feel free to remove any sensitive information) and we will try to give you access to the latest version.