Apologies for reviving an old thread. This is to further help people with getting DOpus to match the sort order that Windows 10's File Explorer and Open/Save As dialogs show.
In addition to turning off "Numeric order filename sorting", I also needed to turn on "Word sort (special handling for hyphens, etc)".
In my case, here's what was happening:
In DOpus, I was getting this order:
ProjectName-SomeInfo
ProjectName - SomeInfo
In File Explorer and file dialogs (Open and Save As), I was getting this order:
ProjectName - SomeInfo
ProjectName-SomeInfo
Without reading the filename, I would click the third file in the dialogs because I had just worked on that file via DOpus and knew it was in the third position, only to discover I'd opened the wrong one.