The override option is what is was talking about in that previous post. So you don't need to change that code anymore but just toggle the override address option.
The question is: once you arrive on paypal, there is a link "I don't have a paypal account, pay by credit card". If you click on it, you should see a form with the address sent by HikaShop.
If you don't see the address, it means that the plugin address options are not correct. If you see the address there, it means that HikaShop properly sends the address. If you still don't have the address in the email receipt sent by paypal,it means that the problem lies in the settings of your paypal account and you should contact paypal for help.