Under the heading projects select new you should now see the following pop up. See hd version of video tutorial here. Starting revit and the revit display to start launch revit wait and then you should see the start window as shown below.
Revit 2014 roof eaves and external wall duration.
O reilly video training 51 705 views.
Creating roofs by extrusion in revit 2014 duration.
If you get any pop ups or any others screens before the screen below just select ok and move on.
Flat Roofs In Revit Are A Mystery To Many People Similar To A Lot Of Elements In Revit There Are Many Ways To Go Revit Tutorial Flat Roof Revit Architecture