ok I think I might be doing a stupid since the beginning... and I apologize for wasting everybody's time if that is the case...

but if it says file for version 1.3.x and I'm on version 1.5.1, do I disregard?

I've taken it to mean that all version 1.3.something have to do it but 1.4.something or 1.5.something don't need to... but it just crossed my mind that it could mean 1.3 and above.. so what's the verdict?