By default, Monkey Tools checks for updates every 14 days (although you can configure this in the Options Monkey form.)  If the version you have installed is older than our latest release, you’ll be prompted  to install it. As far as how often Monkey Tools actually receives updates… that varies. If we are in an active development phase we may push updates several times in a single day. If we’re busy doing other things, you may not see an update for a month or two.