yea what you need to do otonyo is what he said above, stop trying to use "Website Builder" or whatever it is, and just upload the template .html file onto your host server by using file manager or an FTP client like FileZilla.
To edit the file you can use a simple text editor like notepad. You can even edit the .html file from within some popular FTP clients like FileZilla simplifying things even further.
As far as "Website Builder" is concerned, there should be a note telling new people that they don't really need that at all. I mean because from what I can tell new people come on here and see that and maybe they assume that it's the only thing they can use or something and then they try to use it for everything and it has limitations, then they come on the forums asking how to do something by using "Website Builder" and nobody ever tells them that they don't need to be using "Website Builder" at all.
Seems to me it would be a vast simplification if "Website Builder" were completely and permanently removed altogether. Seems more of a hinderance or complication than any benefit.