There are two basic approaches to developing with html-kit. The apparently more popular (but not the one I use) is to keep the website under development on the outside server (whether that is a local one you manage, or a commercial one that is located “somewhere” and download pages to the KIT when you want to work on them.
The less popular, but the one I use, is to keep the files locally and upload them when you want to “publish” them.
If you want to keep them locally and have them somwhere on the web I suggest a tool like FileZilla:
That will permit you to download the entire directory tree.
In either case you want to set up a “Project” for the website
From within the project you want to set up a local folder (if you will be keeping the files locally) or a remote folder(ftp)
if you will be keeping them on the server.
If you are keeping the files locally, you want to set up a remote folder anyway for automatic uploads.
When done, you can just click on the file you want to edit and it will be automagically downloaded and/or uploaded and once you have set up the remote folder.
When you get confused, just ask.