Redmine

I have redmine 3.3.2 installed. I connect it to my current db and copied files folder to it(I already have a redmine 1.3.x version running in one server). My ruby version is 'ruby 2.0.0p648 (2015-12-16) [x64-mingw32]' and I am using windows. I have added some new plugins too and everything is working fine. When I try to add a particular plugin,it throws an error since the plugin requires ruby version > 2.1. What are the procedures I should follow so that I can update ruby and continue to use he current redmine with all my data and plugins?