I am trying to upgrade from 1.3.0 to 1.3.7. I followed the instructions exactly, but when I try to go to my store, it says this:

Fatal error: Cannot instantiate non-existent class: notifier in /home/content/D/a/d/Dadaya2000/html/madebymichelle/new/includes/autoload_func.php on line 79

When I ran zc_install/index.php, it said that my database was version 1.3.7. I checked the proper upgrades anyway (one at a time), but of course it skipped them, saying the files already exist. My boyfriend insists we did everything right, but shouldn't it have said my database was version 1.3.0?

What did I do wrong?