Common problem: moving an instance of WordPress is difficult. You can’t just copy the WordPress directory and paste it somewhere else. Things will break. Rivers will run with blood.
As a solution to this problem, Duplicator, a plugin for WordPress, will make sure you can move your site with ease and without having to do any manual resetting. It even keeps your account settings so after the site is moved you can log in with the same user name and password. Effectively, the only thing that changes is the URL you point your browser to.
Major thanks to Osaka developer James McGrath for telling me about Duplicator and then helping me troubleshoot my silly user errors.