I just grabbed a corner and moved it to the origin. I thought you just wanted to get it near the origin so you could work on it yourself, as you said you couldn’t find it. You can move it to any height you want. Because the drawing was so large and far from the origin, I didn’t move it with the mouse. I clicked once with the move tool, then typed [0,0,0] to move it to the origin. That probably changed the height if I didn’t click on something that was meant to be at floor level z=0.
Moving an object up or down is really basic, you should at least learn a little bit about SketchUp: https://learn.sketchup.com
I don’t normally purge other people’s files as it may remove something they wanted like a component in the file that wasn’t placed yet, or a material they meant to use later, etc. In this case it’s probably fine as you’ve just been given this to render.
The file has 17 scenes set up and they’re all working. If you move that drawing to the origin, the scenes won’t work as the camera will be pointing at the empty space where the building used to be. I suppose they could be modified with a Ruby script. Look at the original file and click all the scene tabs at the top of the window one at a time: a1, a2, a3… a15, z1, exp. I think it would be a mistake to move the building to the origin especially if you’re meant to render each of these scenes.
Here’s a 45MB version with the drawing moved to the origin without changing the height at all, so it’ll be about 1.9m different from last time.