All options available for the Open tab in File View window are those displayed on opening the context menu by right clicking into the view.

There are no configuration settings for this file list. There are no scripting or macro commands for doing something on the list in this tab.

The recently active document windows are listed in menu Window at bottom if the configuration setting Old-style window list is not enabled at Advanced - Configuration - Application Layout - Advanced.

Of course you can send feature requests to IDM support for additional options regarding the list of open files on Open tab in File View.

For example you could request an option to list not saved modified files at top of the list. With this option enabled, there would be two sublists within the open files list which do not need to be visually separated. The first sublist contains the not saved modified files and the second sublist contains the remaining files. In both sublists the file names are sorted just by name or sorted first by file extension and second by file name.

Or another request for an option to list the files always according to last active window history instead of (modification state), file extension, file name.

One more request could be an option to list the files always according to file tabs order instead of (last active window history, modification state), file extension, file name.

I wrote menu Window and not main window, see the attached image.

However, feature requests for more sorting options for the Open tab and also the Files pane on Explorer tab are definitely a good idea, especially if many users request them. I'm not using those two tabs at all as I have usually not more than 5 files open at the same time, except when I want to run some replaces on all open files. So I will not send feature requests for more sorting options to IDM support by email, but perhaps other users do. I have posted already some ideas for more sorting options feature requests.