It looks like something's wrong with that file.
All of your current settings will be lost.
Your settings will be saved locally as a JSON file.
Restore settings (appearance, censor settings, word replacements, vMix settings, etc.) from a settings file you previously exported.
Reset all of your settings.
Sorry, but currently Web Captioner only works in Google Chrome.
You can still look around and play with settings, but in order to start captioning, you'll have to switch to Google Chrome.
If compatibility with browsers other than Chrome is important to you, cast a vote here.