Looks like something is corrupting memory. It could be Opus itself but it's usually a shell extension installed by something else. Unfortunately, with this kind of crash the dump usually only shows what fell over the mess, not what created the mess.
Crash, exit or high CPU when viewing certain directories has suggestsions. In particular, the part on Shell Extensions is worth following.
The dump shows these extensions still loaded at the time of the crash, but it's always possible the one that caused the problem was unloaded before things actually crashed, so these are just the first ones to try if you want to avoid disabling all of them at the first stage:
- Dropbox (DropboxExt64.8.0.dll)
- MSOffice (msoshext.dll)
- Autodesk (several DLLs)
- SpiderOakOne (shell_extension.dll, and lots of Python DLLs)
- TortoiseSVN