It's not currently possible to change the email address of a Thunkable account.
If you want to transfer your account data to a new email address, we recommend the following:
make a new Thunkable account with the desired email address
share your app projects from your old account to your new account
The easiest way to do this would be to keep your old account open in your browser, generating share links, and opening the links in your new account in an incognito/private browser window.
If you have published any of your apps to the Play Store or the App Store, you will need to export the keystore of those apps, and import the keystore to the copy of the app.
You can learn how to do this here.
Please note that we cannot transfer your Thunkable Community account to the new email address.