The final file path specifies where the final wave file generated by the program will be saved. This can be changed with the Save As button. The Base Path button removes the path from the final file path and instead saves the file in the same folder (directory) the program resides. Base Path is only useful when a project file will be distributed to others who have a different directory structure.
The Process button brings up the Process Window and generates the final wave file.
After generating the final wave file, information about its size is displayed in the boxes shown.