I've tried looking for other posts regarding this, but what I have found seems to be prior to my current version, so apologies if this has already been answered.
When editing the Blacklist any changes made do not appear to be saved - even after exiting the application (via File > Exit) and restarting. I'm trying to tidy-up the list, sorting out duplicates, etc.
I go to Settings > Spam Tools > Blacklist and start going through my list selecting Edit then Save once the relevant changes are made. But go back, and it's the same as it was before I made any changes. All other functionality seems perfectly normal.
To say this is becoming annoying would be an understatement