Workflow Configuration not working

I feel like i am going crazy.

I have tried several times to follow this guide to the letter: http://technet.microsoft.com/en-us/library/jj658588(v=office.15)#section4

Everything works as described, until i launch SharePoint Designer, i do not receive the 2013 drop down.

I have tried hosting the workflow farm with SharePoint and without, it makes little difference at all.

Visiting the sites in IIS just gives me HTTP 403 forbidden.

When running Get-WFFarmStatus the backend service is started and has:

WARNING: Endpoint https://server:12290 is not responding: The remote server returned an error: 403 forbidden

Then Frontend service is stopped.

This is doing my head in, it shouldnt be this hard..

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