Sorry, should have been logon.jsp, not index.jsp, in these two places (take a backup copy first)
webapps\BOE\WEB-INF\eclipse\plugins\webpath.InfoView\web\
and
work\Catalina\localhost\BOE\eclipse\plugins\webpath.InfoView\web\
I found it easier to use the file in the work path as a development copy, then once I was satisfied copy it back to the webapps location. You can either use the Tomcat manager page to reload (not redeploy) the application, or just stop/start Tomcat (but that takes longer).