英语翻译以下这段英文是某款第三方软件的license,内容不是很明白,我想知道这段第三方软件到底收不收费,以及将来更新版本会不会收费!This software is copyrighted by Christian Werner and other authors.The following terms apply to all files associatedwith the software unless explicitly disclaimed in individual files.The authors hereby grant permission to use,copy,modify,distribute,and license this software and its documentation for any purpose,providedthat existing copyright notices are retained in all copies and that

英语翻译
以下这段英文是某款第三方软件的license,内容不是很明白,
我想知道这段第三方软件到底收不收费,以及将来更新版本会不会收费!
This software is copyrighted by Christian Werner
and other authors.The following terms apply to all files associated
with the software unless explicitly disclaimed in individual files.
The authors hereby grant permission to use,copy,modify,distribute,
and license this software and its documentation for any purpose,provided
that existing copyright notices are retained in all copies and that this
notice is included verbatim in any distributions.No written agreement,
license,or royalty fee is required for any of the authorized uses.
Modifications to this software may be copyrighted by their authors
and need not follow the licensing terms described here,provided that
the new terms are clearly indicated on the first page of each file where
they apply.
IN NO EVENT SHALL THE AUTHORS OR DISTRIBUTORS BE LIABLE TO ANY PARTY
FOR DIRECT,INDIRECT,SPECIAL,INCIDENTAL,OR CONSEQUENTIAL DAMAGES
ARISING OUT OF THE USE OF THIS SOFTWARE,ITS DOCUMENTATION,OR ANY
DERIVATIVES THEREOF,EVEN IF THE AUTHORS HAVE BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
THE AUTHORS AND DISTRIBUTORS SPECIFICALLY DISCLAIM ANY WARRANTIES,
INCLUDING,BUT NOT LIMITED TO,THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE,AND NON-INFRINGEMENT.THIS SOFTWARE
IS PROVIDED ON AN "AS IS" BASIS,AND THE AUTHORS AND DISTRIBUTORS HAVE
NO OBLIGATION TO PROVIDE MAINTENANCE,SUPPORT,UPDATES,ENHANCEMENTS,OR
MODIFICATIONS.