How to Configure "HTTP PROXY" for Software ?

Hello.

I discovered "Marathon Tool", a tool That allows you to run heavy queries to find the vulnerability of "SQL injections based-time".

Looking where to find the "HTTP proxy" to run this software (Marathon Tool) that does not support SSL but accepts the configuration "HTTP proxy" so that it can support HTTPS websites ???

What HTTP proxy server (address and port) can I put in the "HTTP Proxy Configuration" software (Marathon Tool) to succeed the configuration so that the software that does not support the SSL function can work well even putting a HTTPS site as the target ???

Basically, how to configure HTTP PROXY for software ???

Thank you for helping me.