Wew... You can edit the default value in your exe, but if you're careless, you will broke the exe filesize checksum..
(Correct me if I'm wrong) As we know exe file isn't like a txt file that we can edit freely, exe file has a numerous of headers, and one of them is the filesize.
So it means, if the original value is www.google.com, and you edit it into www.google2.com, them you have added a single ASCII string '2', therefore it won't match your original filesize checksum, because your newly created exe has increased it's size by 1 byte.
If you edit your www.google.com into something shorter like www.google.co, then don't forget to replace the old hex value into 00, not 20 (space)