Occasionally the QuiteRSS window turns grey with a busy cursor and "(Not Responding)" in the title bar. The application never recovers and has to be forcibly closed.
that might be a memory problem. The first approach would be to check the size of the file feeds.db. For the location please refer to
Help -> About -> Information
The size of feeds.db is 260 MB
I ran Clean Up and now some of the feeds' titles from 2020 and 2019 are gone while older ones remain. "Delete Read News" was not selected. Can I undo the cleanup and get back the lost titles? Shouldn't QuiteRSS delete the older news? Can I set Clean Up to delete the older news and keep the latest?