10.1 is a hot fix. Its just fixing one major issue.
Normally the voukoder dialog will be opened with the currently selected preset.
Yes, in DVR you can't store presets AFAIK. But I guess you also want to save / preselect your favorite nvenc options/settings, right? And if we can do this with the video encoder we should be able to do this with audio too. Just like with the output settings. Seems we talking about a preset manager now ...