Tap the ‘Profile Icon’ (third from the left at the bottom bar), select the ‘Flag Icon’ (under the Following list) and choose the round you would like to review or edit.
On 'Round Summary’ tap the 'More Icon' (3-dots at top-right) and select ‘Review Round’.
Then you should be able to scroll through the holes and make the necessary edits and additions. When you're done tap the '3 dot Icon' at the bottom bar and 'Finish Review'.
If you have played your round using Advanced Input: follow the previous procedures but as soon as you enter the Review Round mode, please make sure to turn GPS Mode 'Off' (just tap the 3-dots at the bottom > Settings > Switch the GPS Mode toggle Off). Then, choose the hole you'd like to edit.
If you tap de 'Shot List Button' you can add shots, but if you tap directly on the shot you can drag the marker to another place, edit the club/lie or completely delete the shot.
'Save' your changes or 'Cancel' to review it again.
'Finish Review' when you're done.
Note: you can also edit your shots during the round exactly the same way.