It's the '1P-Goodquality' Video Profile preset, which MeGUI defaults to when it starts.
The other settings were Codec: AVC; File Type: MP4; (no audio)
I don't know what other info to give. To recap...
- I selected an avs file
- The Preview window opened
- I closed it
- I hit Queue (video)
- I switched to the Queue tab
- I hit Start
- I clicked the Abort button on the status window
- MeGUI closed itself