Sage 50 2018 Premium

SUGGESTED

I am a student and at school we use sage 50 Premium . 2018. 

So I downloaded the same version on my laptop , student version of course and each time I try to open any school files I get this message : 

The company file you are trying to open is from Sage 50 Premium accounting 2014 ( release 2014.3)  The student file cannot open company files from  earlier versions of sage 50. 

The thing is my teacher assured me they are using the 2018. 

I have asked sage for help and so far no one has even tried to help and there is one person emailing me who is rude about it as well. 

I am just trying to study for my 6 hour accounting exam :(