Acrobat DC won't merge docs into one

Not sure I explained this correctly.  The update from Acrobat Pro to Acrobat Pro 10.1.16 wiped out the command to merge pdf docs or other docs into one pdf.  My laptop has not been updated to the new Acrobat version, 10.1.16 like my desktop and it still has that feature.  When you highlight several documents with a left click, then right click, you get the command.  That is now missing on my desktop.  I went to the Chat, who referred me to various non-sensical sites, including a paid tutorial.  The tutorial on the Adobe site regarding this issue for Acrobat DC does not play.  I hope that's clear enough.

I've had problems with previous updates on Acrobat and had to repair or reload the software to gain back functionality.  By viewing the forums, it looks like a lot of other people are having problems as well.  Looks like Adobe may have adopted Microsoft's end stage R&D policy, i.e. "get it mostly ready and do an early release, let the masses finish our Beta testing for us!"