Sometimes the App Store doesn’t feel well and issues like this can appear.
Please try the following to resolve this.
- Tap the Restore button on the purchase prompt that appears.
- Restart your device, and then tap Restore in the purchase prompt if it appears.
If neither of those help, you may try the following steps.
- Remove the currently installed Infuse app from your device.
- Sign out of the App Store through Settings > iTunes and App Store.
- Restart your device.
- Sign in to the App Store through Settings > iTunes and App Store.
- If using a subscription, ensure this appears as active in Settings > iTunes and App Store > Apple ID > Subscriptions.
- Re-download Infuse from the App Store, and your Pro features should automatically be restored.