I ended up moving the files from the old location to the new, updating the URL and other related settings in the Admin Panel, and then upgrading to the current version (v1.9.12). This got the system up and active again, but did not do exactly what I wanted. Prior to v1.7, I had spent a lot of time and effort customizing our installation of osTicket to use ZendMail because we couldn't modify our PHP settings due to our hosting plan. This meant I had a number of additional files and directories to make the system emails possible. We changed our hosting plan and gained the ability to modify the PHP settings sufficiently to use osTicket out of the box and when we upgraded to v1.8.02 we overwrote all of the osTicket files that had been modified to use ZendMail and were able to use osTicket as intended with its original configuration. Unfortunately, the extra files and directories were still in place and it was my desire to do a clean install of osTicket (v1.9.12) to our new website, but maintain our history and such by utilizing the old MySQL database. In the interest of time and reducing how long our ticket system was unavailable, I went ahead and used the solution presented here (to move the files and directories) instead of trying to better explain my intent and goals, but this thread may be marked as resolved now.