RE: New 4/25/14 Update 1.7.3 Version
I use to be able to combine PDF files with the wait/collect button; however, with the most recent update that button no longer exists when you initially click print. How do I combine PDF files now? (The Q&A part of your site relating to this also hasn't been updated yet which has added to my confusion.)
are you perhaps not using version 1.7.3 but the latest beta version (1.9.3)?
In version 1.7.3 there are no changes to combining documents.