Gave it a go again to see if I could get it work, still crashes but now when click on the batch window header bar it crashed right away with out any files.
Try it for my desktop, My downloads folder & even tried from my 2nd SSD drive on the root in my laptop. Crashed when I click on the batch window header bar, but
then I tried it off my USB 3.0 4TB raid "0" box and it fired up loaded a file I could see the preview play the file just like you should but crashed when I tried to convert it.
The "outputPath":"D:\\New folder. So I inputted a unique name this time and it work,

"MLV 5D2" , So do you Need to input a name first of it will crash ? I guess so
I would have thought it would just use the file input name. The App & test file was on USB 3.0 drive in a root folder & output path was to the 2nd SSD drive on the root folder. Just run it from my 2nd SSD drive and ok now a long as you have a unique name in that field, but it will crash if there is now file in the batch window and you click on any thing on that side. Well at least it work just need to get a few bugs out.

Edit:
- <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
- <System>
<Provider Name="Windows Error Reporting" />
<EventID Qualifiers="0">1001</EventID>
<Level>4</Level>
<Task>0</Task>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2014-04-16T02:27:51.000000000Z" />
<EventRecordID>27556</EventRecordID>
<Channel>Application</Channel>
<Computer>i7Toshiba</Computer>
<Security />
</System>
- <EventData>
<Data />
<Data>0</Data>
<Data>CLR20r3</Data>
<Data>Not available</Data>
<Data>0</Data>
<Data>raw2cdng.1.5.0.beta.exe</Data>
<Data>1.0.0.0</Data>
<Data>534871ee</Data>
<Data>mscorlib</Data>
<Data>4.0.30319.18444</Data>
<Data>52717edc</Data>
<Data>24d</Data>
<Data>18</Data>
<Data>System.ArgumentOutOfRange</Data>
<Data />
<Data>C:\Users\i7 Toshiba\AppData\Local\Temp\WER4359.tmp.WERInternalMetadata.xml</Data>
<Data>C:\Users\i7 Toshiba\AppData\Local\Microsoft\Windows\WER\ReportArchive\AppCrash_raw2cdng.1.5.0.b_bef85dffdf135db157af789b841bb5ef8296687_291a4a4c</Data>
<Data />
<Data>0</Data>
<Data>b37f3eb0-c50e-11e3-8dcb-6036ddb07e2f</Data>
<Data>1</Data>
</EventData>
</Event>
XML error reporting also getting "System.NullReferenceException" so times
Win 7 Ultimate SP1, hope this helps