Very good program, esp. visualization. See more information on: http://www.codedevelopment.net/
Copy from there for setting:
Extract files from the archive preserving directory tree (C:\fem_toolbox\...);
Add all directories (C:\fem_toolbox\...) to the Matlab path (File -> Set path ->
Add with Subfolders... -> Save -> Close);
In Matlab 'Command Window' type "fem" to launch the main GUI.