If you would like to back up or modify your data, you can export the transactions using the "Export Trades" function.
This will create a CSV file which you can save.
It is now possible to upload this file via the custom import.
When importing data, select custom import via CSV file.
Important: All tax information (links, acquisition data, acquisition prices, classifications, etc.) remain valid during a new import and do not need to be re-entered.