What, if any, is the difference between DEVONsphere Express and DEVONagent Express? I have both installed but wondering why! 
DEVONsphere Express searches documents on your Mac, items in your DEVONthink databases, and on the web and presents them all in one window. DEVONagent Express is an interface on top of web search engines that let you e.g. also select which engines to use. Both use our AI technology to post-filter found items.