WindowBuilder Pro安装出错（求高手）！解决方案

WindowBuilder Pro安装出错（求高手）！
eclipse安装WindowBuilder   Pro时出以下错误是怎么回事？
Warning:You   are   installing   software   that   contains   unsignd   content.
                The   authenticity   or   validity   of   this   software   cannot   be   established.
                Do   you   want   to   continue   with   the   installation?

------解决方案--------------------
放心吧，只是未签名而已，不是错误，点ok继续安装。