No specific info about version 1.4. Please visit the main page of PDF - Merge on Mac Informer.
Tool that allows you merge multiple PDFs into a single, new document.
Edit, convert, combine, and create PDFs on your Mac.
Merge, split, convert, compress, edit, and protect PDF files.
Convert native/scanned PDF to Word, Excel, Pages, Text, Images, etc.
This application lets you extract pages from your PDF files.