If your question is not answered here, please refer to the documentation. If you still have questions, feel free to post to the forums.

RevRatio won't start. What to do?

Have you read the installation instructions and release notes?

A searchplugin tells me I don't have access. What does it mean?

Some online databases only lets users do searches if coming from certain IP addresses. If the server IP isn't allowed, you can use a proxy server.