The bot will notify you when it is unusable (it will show a notification saying that the current client is not supported by the bot, and will close once you hit "ok" on the message). We will not allow you to use an "old" bot with a "new" client for security reasons. (They already tried to catch us with a new detection scheme)
The bot will also update itself when you start it if there is an update available. If it doesn't, just download a new version from the release post in the main forum here, it will always contain the most up to date build.