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Hide specified works on AO3
Sorry, I can only guess what happened (Chrome auto-updated the script) and I doubt there is a way to recover your config. You might want to disable the auto-update feature in addition to backing up your config in a separate file.
I'm sorry you lost your config - I don't use Chrome regularly and did not know that Tampermonkey's default was to auto-update, or I would have advised backup earlier.
All blacklisted tags lost?!
So earlier today, I accidentally closed Chrome. Well, fine, it happens every so often, so I rebooted it and wandered off to look at AO3. And lo, none of my tags were blocked! Much alarmed, I checked the script, and what to you know, IT'S BACK TO FACTORY DEFAULTS. All of my dozens of blacklisted tags are gone!
Please tell me there's a way to recover them. :( I've closed Chrome before since starting to use AO3 Savior and it's never lost my blacklisted tags before! God knows how long it'd take me to find them all again.