Need help downsaving a file to SketchUp 2013

Hi everyone! I am a beginner in metal construction and I need some help. Could someone please open this file and save it as a SketchUp 2013."The file was too big, so here is the link:

file? Thank you!

You can do this yourself by searching the forum or Extension Warehouse for an extension that does this. And there are a few.

Thank you for your advice, I didn’t know about these extensions. I will look for one in the Extension Warehouse to manage my files.

I have been using this

s4u Save As SketchUp | SketchUp Extension Warehouse