Is a crash dump created? Please send us any if they exist:
Crashes like that are usually caused by a bad shell extension (or video codec sometimes, if you are copying video files and the lister or showing thumbnails or columns which cause them to be inspected) that something has installed, possibly when it inspects a half-copied file and doesn't cope properly with the unexpected end of data.
Whether the crash is coming from Opus itself or a 3rd party component, the crash dumps should let us tell you where things are going wrong, and we can work out what to do from there.