Microsoft File Transfer Manager is a wonderful tool to download ISO images and large packages from MSDN. You can suspend downloads when you are on low-bandwidth and resume them later and still be able to download from MSDN without having logging in again. However, in Windows 8.1 you can't search for the Microsoft File Transfer Manager.
The Microsoft File Transfer Manager resides in SystemRoot%\Downloaded Program Files\
When you open this in Windows Explorer, you can't see the application
So the steps to launch it manually is -
Open a command window and change Directory to %SystemRoot%\Downloaded Program Files\
Typeand press Enter
You should have the dialog box right in front of you!