OK – I have got that now and installed + set as an integration with affiliate wp. But it still does nothing – eg if I use the link, sign up and buy a listing it does not store it as converted.
Is there something else I need to do?
OK thanks for all the links and info! I need to get this done quickly so will just put my own code in to do it! I suspected it might be a use case not covered by the core plugin.