The Download Now link will download a small installer file to your desktop. Remain online and double-click the installer to proceed with the actual 9MB download.
MSF is a software that gives you a hidden working area on your hard drive. Its size is flexible, so it only takes the space it need. You can have as many users as you want, all with their individual working areas.
Full Specifications
What's new in version 2.0.2.2
Version 2.0.2.2 may include unspecified updates, enhancements, or bug fixes.