Could you let us know where you are opening these files from? Currently, Adobe Acrobat fetches upto 50 recent files for Document Cloud while there is no such limit for local documents.
Adobe Acrobat Team
thank you for your answer. i currently douwnload files from document cloud aplication of china i am using,and when i finished douwnloading, i open the files in the aplication with adobe reader directly. i want to know if, when i finished douwnloading files, i open the file from the local filefolders instead of opening files from the document cloud aplication, will this problem disapear completely?