Postman Chrome app and Postman stand alone work different

I’m using Postman as a Chrome app for a while now. Very happy about it. Now they are shifting to the stand alone version I might stop using Postman at all. The reason is that they don’t react the same. When I set up a request to my server which will result in a http-404 not found error the Chrome app version of Postman will show the HTML response the server gives. If I do the same in the stand alone version it just says Could not get any response.
The response will give me so much information so I need this html response. Am I doing something wrong or is Postman just not the right tool for me?