Crashes may be caused by problems in Opus itself or in third party shell extensions which get loaded into the Opus process.
They are often triggered by particular files or file types, which can help to narrow down where the problem is.
If you link your account and send us any crash dumps which have been created, we can often use those to determine where the problem is, and whether it's a bug in Opus or caused by a third-party shell extension:
If it's a bug in Opus, we should be able to provide a workaround in the short term and a fix in the next update.
For problems caused by shell extensions, these two guides can also help: