New or improved captcha definitions are very easy to export and import.
--> 'right click
' the captcha --> 'Export Selected
' --> 'To File
' (save local) or 'Share Online
' (save to online database
--> 'right click' anywhere in the captcha overview --> 'Import' --> 'From File' or 'From URL'
To import 'From URL' you can 'Browse Shares
' in case you don't want to wait until next release of CB where new/improved captcha definition will be added.