Style settings tab is found under: FlexmlsIDX > Settings > Style
Template Settings
Select Version 1 or 2 For Listing Summary, Listing Detail Pages, and other Widgets
Colors
Used for various text and button elements on the search & listing templates.
Only used if you've selected "Version 2" above.
Typography
Font settings have been removed. Existing saved font values are still honored on the front end until you save these settings again. New searches and listings use your theme fonts.