1. No. You'd need to look into the server error logs at a detail level not provided by most hosting companies. Hence our documentation instructions of disabling all features and enabling them one at a time to see what causes the problem.
2. I could tell you, but I won't. You are NOT supposed to change any settings by yourself in the database. You'd very likely break your site and we'd be unable to help you in a way that doesn't come to "uninstall and reinstall the extension, losing all your settings". Instead, let's address why you are asking. If you want to keep a copy of your configuration settings use the Export Settings feature in Admin Tools. Exporting the WAF configuration will also export the .htaccess Maker configuration (it exports the cparams row). If you mess something up you can use the Import Settings feature to import this file back to your site.
Nicholas K. Dionysopoulos
Lead Developer and Director
🇬🇷Greek: native 🇬🇧English: excellent 🇫🇷French: basic • 🕐 My time zone is Europe / Athens
Please keep in mind my timezone and cultural differences when reading my replies. Thank you!