Patch notes:
https://forum.paradoxplaza.com/forum/threads/detailers-patch-1-patch-1-1-6f1.1693090/

Video by Biffa:
https://www.youtube.com/watch?v=IVh-TtPOJQA

New content:

• Zoneable Roundabouts
  • 8 New Roundabout Decorations
• Age Selector Added To The Tree Placement Tool
• Surface Tool
  • 2 Concrete Surfaces
  • 2 Grass Surfaces
  • 2 Pavement Surfaces
  • 2 Sand Surfaces
  • 3 Tile Surfaces
• 27 New Service Building Variations
  • New Small Water Tower
  • New Small Medical Clinic
  • New Urban Fire Station
  • 4 New Education Buildings
  • 2 New Police Stations
  • New Small Post Office
  • 6 New Public Transportation Buildings
  • 5 New City Parks
  • 6 New Parking Lots
• 4 New Vehicles
  • New North American Garbage Truck
  • New North American Snowplow
  • New North American Passenger Train
  • New European Cargo Train Engine