The detailed upgrade instructions are located on the official website
OpenProject is a project management system. Copyright (C) 2012-2015 the OpenProject Foundation (OPF) This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License version 3. OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows: Copyright (C) 2006-2013 Jean-Philippe Lang Copyright (C) 2010-2013 the ChiliProject Team This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. See doc/COPYRIGHT.rdoc for more details. ++