THe program is distributed as a compressed archive with tgz extension (archived with tar and compressed with gzip).
On a UNIX-like system (e.g. Linux) you should fisrt find the document root folder under which your web server stores all its files.
Example 6.1.
To uncompress the program under /var/www/html open a shell and move to the directory where you have saved the archived file then insert the following commands (change the version number as needed) tar -xzvf webswf-0.1.tgz -C /var/www/html
The commands print on the terminal the list of files while they are been uncompressed and copied to the destination folder (in this case /var/www/html/webswf-0.1
You can rename /var/www/html/webswf-0.1 to /var/www/html/webswf with mv /var/www/html/webswf-0.1 /var/www/html/webswf