Finally, I know what is happening. The problem was with the trial, it processed only the first (oldest) emails so that the filters would only work if the filtered messages were among the first 20 messages
I have uploaded version 3.7.2 that fixes the issue with the trial. We have also made the generation of the RunLog.txt optional and have this as an option under the general options.
Thank you for sending the log, it has been quite helpful.