Keep in mind that new Chorus seems to have bug. It can not open preset list from main GUI but you can open preset window in routing panel

edit: if chorus is loaded in mixer slot you can access preset list for this device by right click on effect name and you will get option window with 4. options: remove, insert, surfaces and hide. You can access preset list from surfaces window.
I see some people miss some presets for some devices etc...well you can simply copy everything from your "old" Scope 4.5, name properly if needed and they will work!!!
Enjoy!