I have a WinCC Flexible project that was built under WinCCFlexible 2008 SP2 on a Windows XP machine.  I want to convert to 2008 SP5 and put the project on a new Win10 machine but I encountered the following:

1) I installed WinCC Flex 2008 SP5 on the PC running Windows 10 no problem.  I could not open the project.  I received the following error:  

The project cannot be converted because Microsoft discontinued migration support of MSDE databases with SQL Server 2012.  MSDE was used within WinCC Flexible 2007 or earlier versions.

Please convert your legacy project first using a WinCC Flexible 2008 SP3 installation on Windows 7 or XP.

I am having trouble locating a copy of WinCC Flex 2008 SP3.  Is it still available?  Is there an alternative approach?  (SP5 will not install on the PC running Windows XP).