This area of the main window is used to define the location where the extracted text files are to be saved to.
TEXTfromPDFs default behavior is to save a text file to the "Same Folder as PDF" and change the file's extension from PDF to TXT.
For example:
Original PDF document specification:
C:\My Documents\Work Docs\Proposal.pdf
Output Text file specification:
C:\My Documents\Work Docs\Proposal.txt
You can change this default behavior by selecting the "Other" option button and specifying the folder. All text files will then be saved to the folder location that you specified. Using the example above again, the Proposal.txt file will be saved in the destination folder that you chose.