Before you reset your password, Please carefully read through the backup encryption
If you forget your password, you can reset it through this form. As explained elsewhere in our FAQ, you must provide the encryption key when restoring encrypted data. If you used the forgotten password as your key, you will not be able to restore your data.
It is imperative, then, that you create a new backup set for your data. On the other hand, if you used a custom key when creating your backup set, forgetting your account password would have no affect on your ability to restore your encrypted data, so long as you remember the custom key.
If you need help please contact Support