1. Make a backup of your entire webcp directory.
2. Save a copy these files:

  • webcp/webcp.sql
  • webcp/httpd/include/include.httpd
  • webcp/include/include.named
  • webcp/config.php
  • webcp/web/skins/list

3. Extract webcp-0.5.x.tar.gz and overwrite your webcp directory.
4. Replace include.httpd, include.named, list and config.php with your saved copies.
5. Diff your saved webcp.sql file against the webcp.sql file included in the new version to ensure there are no database changes.