You need to Uninstall SQL Server 2014 CTP1 to install SQL Server 2014 RTM

SQL server 2014 RTM will be available from April 1, 2014. It's time to take out SQL Server CTP1. You really need to take out CTP1 if you have installed it as these are the general restrictions:

• Upgrading from SQL Server 2014 CTP 1 to SQL Server 2014 RTM is NOT supported.
• Installing SQL Server 2014 CTP 1 side-by-side with SQL Server 2014 RTM is NOT supported.
• Attaching or restoring a SQL Server 2014 CTP 1 database to SQL Server 2014 RTM is NOT supported.

However upgrading from CTP2 is supported but degrading to CTP2 from RTM is not.

According to the same source the following upgrades are supported as seen in the referenced link:

• Attach a SQL Server 2014 CTP 2 database to an instance of SQL Server 2014 RTM.

• Restore a database backup taken on SQL Server 2014 CTP 2 to an instance of SQL Server 2014 RTM.
• In-place upgrade to SQL Server 2014 RTM.
• Rolling upgrade to SQL Server 2014 RTM. You are required to switch to manual failover mode before initiating the rolling upgrade. Please refer to Upgrade and Update of Availability Group Servers with Minimal Downtime and Data Loss for details.
• Data collected by Transaction Performance Collection Sets installed in SQL Server 2014 CTP 2 cannot be viewed through SQL Server Management Studio in SQL Server 2014 RTM, and vice versa. Use SQL Server Management Studio in SQL Server 2014 CTP 2 to view data collected by the Collection Set installed in SQL Server 2014 CTP 2, and use SQL Server Management Studio in SQL Server 2014 RTM to view data collected by the Collection Set installed in SQL Server 2014 RTM.

Watch for a detailed post on uninstalling SQL Server 2014 CTP1 here:
http://hodentekMSSS.blogspot.com

SSDT BI templates for SQL Server 2012 CTP2

You will get SQL Server 2014 CTP2 Data Tools BI Project templates if you install Microsoft SQL Server 2014 Data Tools BI for Microsoft Visual Studio 2012, CTP2. Note that this does not work with Microsoft SQL Server 2012. It is supported only on x64 architecture of Windows Servers 2208 R2 and 2012 but on both X32 and X64 for Windows 7 and Windows 8.

Download link here
http://www.microsoft.com/en-us/download/details.aspx?id=40736

This installs the Microsoft SQL Server 2014 CTP2 Data Tools Business Intelligence project templates for Analysis Services, Integration Services, and Reporting Services.

Make sure you have these on the computer as prerequisites:
•Microsoft .NET Framework 4.5
•Microsoft Visual Studio 2012 Shell (Isolated) Redistributable Package
•Microsoft Visual Studio 2012 Shell (Integrated) Redistributable Package
•Microsoft Visual Studio Tools for Applications 2012
•Microsoft Report Viewer 2012 Runtime
For more support information follow this link here.