为什么我的MATLAB激活成功后打开还是激活界面

mark一下，今天是2017-11-13，星期一，打开matlab一下，出现以下界面：

怎么突然提示需要激活呢？然后使用之前安装的matlab license文件，提示激活已完成，如下图所示：

但是，点击“完成”按钮后，matlab即退出了。重新打开matlab程序，依然提示要激活，好晕啊~~~~~~

上网一搜，好多遇到这个情况的，在http://tieba.baidu.com/p/4412139066贴吧上找到了解决方案。

把系统时间更改到2017-11-11之前就可以了，比如2017-11-10，就可以成功的打开matlab了。在打开matlab后，发现有提示语句，如下截图：

暂时可以使用了。但总觉得更改系统时间不可取，有没有其他方法呢，能不能更改license呢？网上大牛很多，果然有人做到了，打开license文件，不更改和删除任何原有内容，将以下文字复制和粘贴在license.lic文件的末端，然后保存为扩展名为.dat的文件。重新进行一次激活，选中修改后的.dat文件，这时候激活成功。再次打开matlab时，就算系统时间没有更改到2017-11-11之前，matlab也是可以正常使用的。

该部分修改转载来源于： http://blog.csdn.net/liyanzhong/article/details/78517693，非常感谢。

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以上绿色字体是需要复制和粘贴到.dat文件中的。

至此，这个2017-11-11的“诅咒”就可以解除了。

又可以继续使用和工作了。