Redmine

Hi, I'm trying to make some changes to a plugin we've installed (Goyello's stuff_to_do), to tailor it to our needs. I've never done this before. I'm trying to replace some fields, shouldn't be to hard right?

I've edited some .erb-files in /vendor/plugins/redmine_goyello_stuff_to_do/app/views/stuff_to_do and uploaded it to the server. The changes doesn't show on Redmine. Is the whole page being cached? Can I clear the cache? Or am I doing something else wrong?