Steve,
A quick answer for you. The update has turned on strict validation which you can turn off.
This article provides a solution for you and contains other useful information.
Basically, in the Preferences, got to the CodeMix>Settings>Workspace Settings page and look for javascript.implicitProjectConfig.checkJs
. Set it to false
and apply the change. You should now not see the validation markers.
Please let us know if this works for you.