Just ran the database cleaner again. This time, strangely, cleaning times were in line with your earlier prediction of around 20 minutes, even though the database size remains unchanged at 159MB!
I started the cleaning around 1726-1727 and it finished at 1742. So around 16 minutes. I'm wondering why the first cleaning, which presumably did get rid of whatever in the database was wrong, took so much less time.
Another thing to report: this time on returning to the normal CC browsing screen with books, it was immediately usable, no sluggishness or failures to respond. Dare I suggest that when cleaning produces changes in the database, you would need to shut it down and reboot the app, but not if otherwise?
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