Hi - I'm in the process of upgrading from ZenCart 1.3.7 to 1.3.8 and I'm getting the 1.3.8 version all set up in a subfolder before we transfer to that version. I've added two mods - one for Sales Tax, and one for FAQs, but when I try to go to either page on the admin side I get this error:

ERROR: admin/includes/configure.php file not found. Suggest running zc_install/index.php?

I've checked the file permissions and they are 644. The site isn't showing any other errors, I just get access the two new mods. Any guidance greatly appreciated!
Thanks,
Cait