Of course you can use GSA Captcha Breaker (CB) with GSA Website Contact in the easiest way possible. In the project options you click Captchas→Add and choose GSA Captcha Breaker.
When clicking the TEST button, you should see it being able to communicate with CB. If that's not the case, close GSA Website Contact and start it as Admin (right click on icon→Run as Admin).
In case you have problems getting this to work, follow this guide: GSA Website Contact Not "talking" to Captcha Breaker Workaround