If you want to change your TransferChain password, you can reset it in the app by following these steps:
Go to the settings in the lower left corner of the Web App and access the security section. There, you will find the "Change Password" button, and you can set your new password from this location.
Note: After changing your password, you'll be automatically logged out from all devices. Next time you log in, you'll be asked to enter your recovery phrase, so make sure to store it.