Dear @ctgraham,
I tried to solve the problem with upgrade OJS 2.4.8.1 to OJS 3.0.2 but have a big problem. As you can see on Database error on upgrade OJS 2.4.8.1 to OJS 3.0.2 - #12 by asmecher I tried a lot but nothing. Problem with database. Could I instal OJS 2.4.8.1 in the new directory, import articles and issues from old and than to upgrade this version of OJS to OJS 3.0.2? Also, do I need to copy directory file (where are all articles and issues in new directory). How to solve my problem with upgrades?