GoodSync syncs files between your computer, mobile devices, FTP, SFTP, Amazon S3, Google Drive, SkyDrive, WebDAV, Azure.
Go to http://www.goodsync.com/ download GoodSync and install. I checked "Do not setup GoodSync Connect" and finish install.
Click "Create a New Job" button to create a new synchronize job.
Select MWeb build site path for the left panel.
If you didn't change MWeb build site path,the default path is:
To find this path, you must checked
Show hidden Files/Floders.
Select sync to path for the right panel.I choose sync to FTP.
Click "auto" button,enable On File Change: Analyze,Sync. Click "OK".
All is OK!!
When you click "Build site" button in MWeb, GoodSync will automatically synchronize your static website to FTP.