The Wow Web Stats Client is a small Java application that parses your combat log and uploads it to the WWS website.
WWS needs a working directory to put temporary files and archive your log files after they've been uploaded to the WWS Server. A default directory is chosen for you at startup, you can change it if you like.
The "Archive and delete logs after upload" checkbox lets WWS manages your log files from A to Z : every time you successfully upload a set of logs on the server, these logs are compressed and archived in the working directory, then the original log files are erased, so you're ready to run a new session of World of Warcraft.
The "debug console" may bring some magic to WWS :)