Hello, I built a model back in 2013 and thought that I had a solid backup of the file. Since then I have gotten a new computer and was going to show a friend my model so I downloaded Sketchup 2016 and tried to open my file but I received the unexpected file format error. I then uninstalled sketchup 2016 and tried downloading sketchup 8 but that didn’t work either. Lastly I downloaded sketchup 2013 and was actually able to see preview of my model but when I tried to open the file I again got the unexpected file format error.
I tried reading through some of the forums and i think that I might have layers in my model so maybe that’s causing an issue but at this point I don’t know what else to try.