Currently, there is no option to change your base currency while retaining your existing data.
The only option is to delete your data and start fresh. The good news is that this process won't affect your subscription, you'll only lose the data associated with your account.
Prevent a considerable amount of data loss by utilizing the Import and Export features. These tools allow you to safeguard and restore your valuable information.
How to change main currency
The instructions on how to do delete you data can be found in the article how can i start over and delete all data?
After deleting your data, you'll be prompted to select a new main currency. Choose wisely, as making a thoughtful decision now will save you from having to repeat this process later.
You can back up your data for to recover your data later on. Use the export feature, it allows you to save your information for later how to export transactions from Wallet
With your export file, you can now use it with the Import feature on the Web App how do I import data into Wallet?