How to use RegEx to remove text in a string and replace text with the updated expression

I have a date field coming in from a csv file that stores the dates as '2013-12-11T05:18:37.419+00:00' (V_WString type) and I need to get the date to look like '2013-12-11 05:18:37'. I know the RegEx Tool has the capability to do this, but I cannot for the life of me figure out how to set up the regular expression. Please Help!