That depends on what kind of uploading protocol you use. If you are using
FTP, just open Windows Explorer and/or My Network Places and click on the
ftp connection to your site that you have there. After making the
connection, just drag and drop the file right alongside the index.htm file
and the index_files folder which are in the root directory. If you made a
HTTP connection, that might also be in the Network Places. Alternatively,
just login to the file manager on your host, and use the file manager to
upload the single file.
DavidF