That doesn't happen for me, at least with the sample file I found here:
Can you provide an example file that crashes?
Do you still see a crash if you turn off both of these?
Preferences / Viewer / Viewer Pane:
- Display shell thumbnails
- Display shell icons
If turning those off means it no longer crashes, then it's a third party thumbnailer or icon provider for the format which is crashing. You can disable those using ShellExView.
If it still crashes with those turned off, try turning off all viewer plugins at once.
If crash logs were generated, you can send them to us in case they identify the code or component that is crashing. It's most likely something outside of Opus as nothing in Opus knows about PVZ files.