Open, Save File dialogue box

I have accidentally changed the default for the ' Save,Open, File'
dialogue box that comes up when downloading anything. Can anyone tell me how to get it back please ?

Are you saying that when you download a file, such as a document from an email, after you save, you no longer automatically get a window asking if you would like to open the file or folder? That is what is happening for me as of today.

No, when you select 'download' for a file, you usually get the File Download Box coming up asking
'Do you want to open or save this file ?

I get something else come up instead which is the result of my error.

yes here it is

PS I am using IE 9

? no I amdefinitely IE9

My error was made in 'associate a file type or protocol with a program'

No, uninstalled IDM but still have the problem.