Spliting using top bookmark on DC

Hello,

I have both versions of 11 and DC... With 11 I was able to run Tools/Pages/Split using "Use top bookmarks as filename" and it was working excelent selecting all the PDF files in a folder... today I tried to do the same process using My DC I noticed I am only limited to a single file to split!  Paying subscription means that we should lose functionlity also?!! why?

Regards,

Jeff P.