Thankfully Matt had copies of the files from when he last fixed it and the Shield Gallery is working again.
Still going to consider whether or not updating the format/script is worth investing. While the current version works, I cannot add new entries or update existing ones without digging into the database.
It'd probably be easier, and better, in the long run to add a photo gallery plugin to WordPress and import all the photos from the shield gallery into the WP Media Library, and then build out new shield gallery pages right in WP.
There are TONS of different photo gallery plugins with different capabilities (all of them free), but the overall general process would be to create a gallery of all the shield photos from one state, create a shortcode of that gallery, and drop it into a page for that state, publish, and repeat for all states/provinces/individual gallery pages.
It'd be time consuming upfront to set up, but fairly easy to maintain after that, and without any major coding headaches.
Also, the shield generator should probably be retired since Flash is officially dead.