If the crash happens when changing folders, please see Crash, exit or high CPU usage when viewing certain directories.
If the crash happens when right-clicking files or folders, please see Crash, exit or high CPU usage when right-clicking certain files.
Otherwise, please tell us details of when the crash happens and what Opus was doing at the time. Please also see if a crash dump is created matching the date and time of the crash. If crash dumps exist, please email them to leo@gpsoft.com.au