SQL Server Management Studio Express 2012 "ONLY"
I have installed SQL Server Express(SSMS) 2012 with management tools. After a few months, the Management studio has stopped working. The error is: 

««
Evaluation period has expired. For more on how to upgrade your evaluation software please go to
http://www.microsoft.com/howtobuy
»»

I dont know why this happened with the express edition. Maybe the Management studio is not released as express edition. What should I do now to get SSMS work with SQL Server 2012?
The earlier releases of SSMS do not work with SQL Server 2012 and I must use SSMS 2012.
SQL Server Management Studio Express 2012 "ONLY"
===

I have installed SQL Server Express(SSMS) 2012 with management tools. After a few months, the Management studio has stopped working. The error is: 

««
Evaluation period has expired. For more on how to upgrade your evaluation software please go to
http://www.microsoft.com/howtobuy
»»

I dont know why this happened with the express edition. Maybe the Management studio is not released as express edition. What should I do now to get SSMS work with SQL Server 2012?
The earlier releases of SSMS do not work with SQL Server 2012 and I must use SSMS 2012.