If Restore Purchase doesn't work, please follow the next steps:
1. Make sure that you have bought In-App purchase for the software from Apple ID you are currently logged into. More information on how to check your purchase history in the App Store or iTunes Store can be found here:
https://support.apple.com/en-us/HT204088#computer
2. Once you have verified that the In-App purchase was done from the same Apple ID, click the “Buy” button instead of the “Restore Purchase” option.
3. As In-App purchases from the same Apple ID cannot be charged twice by Apple.
They will be re-downloaded one more time
and you will be able to access the full software functionality.
