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Installation

1. Extract the ZIP-file
2. Copy the derky folder to your board's ext/ folder
   After copying the path should look like this: ext/derky/sortablescaptcha/
3. Go to the Admin Control Panel (ACP) -> Customise -> Manage extensions
4. Enable Sortables Captcha
5. Configure the questions and set the captcha as default (see below)

Configuration
To configure the questions go to: ACP > General > Spambot countermeasures > Select Sortables Captcha and click Configure and add the questions and answers.
Make sure to re-select Sortables as default captcha and hit submit after you configured the questions. (This is not done automatically)