If you are an Advanced User who has priviledges to edit Registry here you go.
Close Visual Studio (if its open)
Start > Run > RegEdit
(Backup registry before making changes)
remove unnecessary items from list.
If needed reorder your list. File1, File2 etc. Otherwise Visual Studio might not read them properly.
Similarly repeat the steps for FileMRuList
If you can’t edit registry or not feeling comfortable here is an alternate method.
Happy Programming 🙂