So you have the database file, that’s good.
Thank you for the reply. Unfortunately, when I go to the AnkiApp Importer, it says:
Make sure all your AnkiApp decks are downloaded before using the add-on. For that, go to AnkiApp, click on each of your decks, then click on the Download button at the bottom if it’s shown.
Maybe that’s just a generic warning that doesn’t indicate that the import will fail. Are you able to go through with the import?
For questions about the importer, there is a dedicated thread Copycat Importer (AnkiApp/AnkiPro)