Free AuraDB database is deleted and how to reload the database from desktop

Good day,
I am new to neo4j. A few months ago, one developer assisted me with setting up the AuraDB free database and load the data (nodes and relationships) created offline via the neo4j desktop.
As I did not notice the email notification of deleting the AuraDB database after 1 month of inactivitity online, the online database is deleted now. As I did not keep a copy of the original database loaded on AuraDB, I wonder how I should find the database created offline (under which folder or file?) and reload it to a new online database? and must I regularly upload the offline database online manually, alternatively is there an automatic way to synchronize both?
Thank you for your help in advance!

Was your database on Neo4j Desktop a remote connection to the AuraDB instance? Or was it a local database with the data on it? If Desktop connected to the Aura instance only, I'm not sure there's a way to get the data back. If Desktop was a local copy of the data, then I might recommend something like apoc.export to get it out.

Thank you Jennifer for the suggestion.
If the data is on the desktop version (part of the Web app we develop), what specific steps must I follow in order to export the data and upload them to AuraDB?