Help with addonFollow

I could use a bit of help here. I installed a addon some time ago then deleted it but for some reason when I login my pally I get a error msg that the addon can not load and to click here to disable it. I have clicked on disable so often that I can now do it with my eyes closed. There must be a char ini file somewhere that has the info stored but I can't find it. Anyone know where that might be found on a win Vista PC?

Thank you, was a big help.