I made some models, and also downloaded some models, that I would like to use in SWBF. However, I don't know how to properly export to a format that I can open up in 3D object converter and export it.

There's an obj export plugin for SketchUp in the XSI FAQ thread called ObjExporter.rb that works well.

Awesome, how do I install it?

The *.rb file goes in the plugins folder of your SketchUp installation.
The location of this folder changes depending on what OS or version of SketchUp you use.

http://help.sketchup.com/en/article/38583
http://sketchucation.com/resources/tuto ... up-plugins

Now I am having this issue, after trying to install the plugin and following the tutorial:




Any ideas?

You're using SketchUp 2015 and Trimble changed the plugin API back in 2014 that broke many old plugins.
http://help.sketchup.com/en/article/3000050

I have SketchUp 8 and it works with the plugin. You might be able to modify the syntax and get it working for 2015 though.
You can read the error and examine the file to see if you can track down the correct syntax to use but you'll probably run into a slew of other errors along the way.

Oh that sucks :/

What year was Sketchup 8 released? I'm going to see if I can find it somewhere

oldversion.com has versions 5 to 8:
http://www.oldversion.com/windows/google-sketchup/

And then installing the obj converter you provided, should work properly now?