I was able to follow the steps to delete all the recommended files. I'm unsure of the root cause of the crash, but I've got TurboTax back up and running. Most applications for Mac (unlike Windows) don't have an 'uninstall' program that removes all footprints but many Mac apps don't need it. TurboTax probably ought to. Even still, it was pretty simple to move them to/empty Trash and download / re-install.
