Robohelp 2017 Predictive Search Does Not Work

We just upgraded from RoboHelp2015 to 2017. We opened our 2015 responsive HTML project in 2017. Is this all that needs to be done to "upgrade" the project? I was able to create the RHTML5 output, but the predictive search doesn't work. Is there a different way to "upgrade" the project other than opening the project file (after deleting the CPD file)? Is there a setting in RH that "turns on" the predictive search capability that we need to do? We are still using the Charcoal_Grey screen layout. I saw another team within our company that upgrade a similar project using the Charcoal Grey screen layout and their predictive search works in 2017 output.