Because the application is "web-launched" You always get the most recent version without having to do anything special.
If the Desktop App won't work, Read this FAQ entry.
After download, look for this Shortcut on your desktop:
Use the Desktop App for fast and powerful access to your My Docs Online Account
The My Docs Online Desktop App combines the best features of our browser and web folders - all in a single, powerful tool. Upload and download multiple files and folders. Create, Delete, Rename. Move or Duplicate files and folders. View a file. Online editing for any file type. File Locking provides sharing and file editing capabilities that are crucial when multiple users participate. Search for files and folders. "Remember Me" and "Open Last Folder at Startup" make login faster. Watch the video, above. DOWNLOAD the Desktop App Now