Hey silvam14,
great job! As you've already tested it, here comes the description for every one how to
export from sketchup free version to obj format:
Go to
OBJ Exporter (SU Plugin) - Ruby Library Depot
this is an obj export plugin you can download and then copy to this folder (if you intstalled sketch up at the same path as I did):
C:\Program Files (x86)\SketchUp\SketchUp 2016\ShippedExtensions
With my version of Sketchup it seamed to work very well. After the downloaded file is in place, you will notice a new entry in Sketchup under "file" named "OBJexporter...".
I am using Sketchup make 16.1.1450 32 bit
Also, for everyone who wants to know how to import stadiums into ootp17, here is a short youtube tutorial:
https://www.youtube.com/watch?v=9b8jXA0KkIE
Have fun :-)
Jorin