Web Developers An important feature and good news: XKat remembers uploaded files' last modified date. This allows you to synchronize the files on your local PC with the files on your ISP's web server. Upload times -- using FTP -- will be faster because only those files that have changed since your last file transfer will be sent to the web server. XKat can save and use multiple Internet accounts. By combining multiple tasks into one job, you can upload to many different sites in one click of the mouse. Note: Copying files to and from the Internet is only supported in the +Internet version of XKat.