filter stopped working after years

filter stopped working after years

Hello all,

I've this basic mail mail filter set up and working for years, I would send email to a folder based on sender and subject.  Yesterday the filter stopped working and the email was collecting in my inbox. I know the only events that happened was I inadvertently moved the destination folder to a new location and then back. when I noticed the filter not working, I checked the filter to ensure all values were correct, and they were. I created a new filter to perform the same action, and that one doesn't work. 

I'm not sure what I did to make my mail filters stop working.

any ideas?