winmerge how to use line filters

I have two text files, some lines starting with a forward slash (/). I want those lines to be ignored. Line filters are definitely enabled, and I've tried ^/ and ^\/ wi开发者_如何转开发th no luck. I even tried to use ^.*$ to try and ignore all differences, and that didn't work. What am I doing wrong?

Silly me, there is a check box next to the line filter. So when you add a line filter, it doesn't automatically default to be on. You have to manually apply it.