Before I upgraded to the latest version, I was able to see the thumbnail files that Opus creates. But after upgrading, I don't see those anymore for the new epubs I put in the Opus. I only see them for the ebooks I placed in the Opus before the upgrade.
I ended up remaining the ePub file (adding an extra space) and it refreshed. Is there something I have to do to unhide the thumbnail files?
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