I've used TB for years, and recently upgraded to a new computer with Windows 8.1. I installed the latest TB 24.4.0 and email accounts, and started to set up filters. I found that if I set up a filter and then immediately Run it that it works, but if I set up a filter and didn't immediately Run it, it would not run at all, whether manually or when restarting. I've even tried changing the filter to see if it would run, but it won't work at all. All the usual settings are in place, but it won't run, and the filter log doesn't show any activity.