Options
After conversion: There are three items in the option. "Do Nothing", "Open output folder", and "Shutdown computer". If you select "Shutdown computer", then the computer will shut down automatically as soon as all work has been done.

Existing File: There are three items in the option. "Ask always", "Overwrite", "Create new file". If you select "Overwrite", it will directly overwrite exsited file without any notice. If you select "Create new file", it will then automatically create a new file name once it detects there is a same one in the directory.