It includes cURL for Windows, plus a user-friendly interface for managing your sftp known_hosts and automatic updates for cURL.
You should not be effected if you bought version 1.0.0 and then upgraded to 1.0.1. This bug only applies to users who bought cURL Manager 1.0.1. Uninstall the cURL Manager you have, and reinstall it from the new download. If you purchased the cURL Manager in the last two weeks, you will recieve an e-mail offering you a new file to download.