How to save for CS5.5 and above?

Hey,
I know if I want to save a project for older versions I should choose Save As option then go back to the version I want. But how some of the files on videohive are just one project file and they work with all CS5.5 above versions?

Thanks.

No. You can’t choose the version you want. You can choose only one step lower version:
from CC2018 only to CC2017
from CC2015 only to CC2014
from CC2014 only to CC12
from CC12 only to CS6
from CS6 only to CS5.5
from CS5.5 only to CS5

You can open any file in any higher version. But after save you will not open it in source (lower) version of AE