I've updated to the latest version for ubuntu and lost the channels I had syndicated (I had no backup). Is there any way to recover them?
If it is not possible without a copy, how can you return to the previous state to make a copy, and then update?
Sorry, I can restore manually (copi and paste) from .local/share/QuiteRss/QuiteRss/debug.log
for the future I recommend a regular backup of the files feeds.db and QuiteRSS.ini.