Ender 3 + Marlin 1.1.9

Updated my Ender 3 with Marlin 1.1.9 downloaded from Marlin site. Used sample config files for the Ender 3.

The printer now has lots of new configuration settings and won’t home - X axis just shudders etc.

Am I correct that I need to update the settings? Where can I find what they should be?

Thanks

Sorry, my problem. Re-seated connectors and its fine! Duh!!