How do i find my original files for upgrading?

[a5r6t]

I am interested in upgrading from 1.39 to 1.51. But I don't know where my original version is. Can I upgrade without knowing the add-on and changes from the original version? back story - I bought a business that uses zen cart, but I am having problems finding the original version. I use EWD hosting and I have checked the files in file manager but I can't find it. can i look at the add-on folder and find how the current version has been changed?

C

[kobra]

Can I upgrade without knowing the add-on and changes from the original version?

Only if the addons were all files based and did not affect the database

[win8win]

1:back up
2:have a try
3:if any add-on donot work, reinstall these add-ons

[DrByte]

You can obtain official original Zen Cart files for every version of Zen Cart from the official distribution point on SourceForge at: www.zen-cart.com/getit

Then you can compare all *your* files against the original files, and see what's different. There are many text-comparison tools to make that task easy. http://www.zen-cart.com/wiki/index.php/Useful_Tools

[a5r6t]

Thank you to everyone!