ScreenSteps and Salesforce Lightning
The contextual help ScreenSteps app that is available for ScreenSteps in the AppExchange will only work with Salesforce Classic, not with Salesforce Lightning.
You can still embed your ScreenSteps site as an iframe inside of Salesforce Lightning, but contextual help will not work.
Contextual help in Lightning
We have a new approach to contextual help that will allow your employees to get context sensitive help inside of Salesforce Lightning (as well as any other cloud application).
If you would like to try it out, please contact firstname.lastname@example.org.