- why a login is needed (connecting to BW server) to access my local data?
When you log out, all data is cleared. When you log back in, data is redownloaded and decrypted.
- Murphy’s law is known, when you need your data, for whatever reason, you have to login again and you don’t have an internet connection available. Thus, you are locked out of your data even if datas are already existent on your device.
You should keep a backup copy on paper for this eventuality (or maybe store it in an offline password manager like KeePass, on a USB stick).
Here is the lead developer’s thoughts on this topic, if you haven’t seen them.