This software can be used to merge N pdf with N pdfs, all serialized, the second file must have the tag "_A" at the end of the file name.
The file name from first and second folder should match with "_A" appended. To store the results the result folder is to be specified.
Run the setup file and then run the executable.
Eg. Folders
Folder A/
├ file1.pdf
├ file2.pdf
├ file3.pdf
Folder A/
├ file1_A.pdf
├ file2_A.pdf
├ file3_A.pdf
result_folder/
With this select folders from GUI and Merge the pdfs