Good to know!
To my eye they look similar, too. Except for the fact that the position mark (blue line) doesn't advance any more, when playing the sound. :-(
(Reported to support. I hope they'll come up with a solution.)
I have been using WinOnCDs Soundeditors since version 2008. Had been happy with 2012 on Windows 7 until I needed a new CD/DVD burner. Soundeditor 2012 aborts burning. Since this version isn't supported any more I bought NXT5. Same error. :-( (Reported to support. I hope they'll come up with a solution.