To install KeyCAPTCHA to your q2a site you should:
- Copy directory keycaptcha-captcha to qa-plugin folder of your Q2A site.
- Register at keycaptcha.com and add your site to sitelist with CMS type, for example, MyBB
- Edit KeyCAPTCHA plugin settings and paste your Private Key from keycaptcha.com account>site list>installation instruction
- Change captcha type in "Spam" settings of your site to KeyCAPTCHA That's all!