Here is also a quote from Kevin Clark(Support team member):
The link that you were given explains how to use Q&A captcha instead. It's built in. It will replace GD for you.
As long as you keep GD on there, you'll get spambots.
How to configure Q&A
- Admin CP> Spambot countermeasures> Installed plugins> click the dropdown box and select Q&A (it will be greyed out)
- Click the configure button then click add.
- Add your question and answer (you need a Q&A for each language you have installed) click submit.
- Click “back to previous page†then click “backâ€
- Select Q&A from the dropdown box (again)
- Click submit at the bottom of the page.
- Done.
