Failed to establish and ODBC connection with the database server after restaged PC

My PC was restaged and I've upgraded the versions of Visual Studio to 2017, SSDT to 15.1.xx, SSIS designer to 14.0.xx, TTU:
Version Display Name
--------------------------------------------------------------------------------------------------------------------
14.10.00.03 Teradata Visual Explain 14.10.0.3
15.10.01.00 Teradata GSS Client nt-x8664 15.10.1
16.10.0.0 .NET Data Provider for Teradata 16.10
16.10.00.00 Shared ICU Libraries for Teradata 16.10
16.10.00.00 Shared ICU Libraries for Teradata nt-x8664 16.10
16.10.00.00 Teradata Named Pipes Access Module 16.10
16.10.00.00 Teradata Named Pipes Access Module nt-x8664 16.10
16.10.00.00 Teradata OLE DB Access Module 16.10
16.10.00.00 Teradata OLE DB Access Module nt-x8664 16.10
16.10.00.02 Teradata BTEQ 16.10.0.2
16.10.00.02 Teradata FastLoad 16.10.0.2
16.10.00.02 Teradata SQL Assistant 16.10.0.2
16.10.00.03 ODBC Driver for Teradata 16.10.0.3
16.10.00.03 ODBC Driver for Teradata nt-x8664 16.10.0.3
16.10.00.03 Teradata Data Connector 16.10.0.3
16.10.00.03 Teradata Data Connector nt-x8664 16.10.0.3
16.10.00.03 Teradata FastExport 16.10.0.3
16.10.00.03 Teradata MultiLoad 16.10.0.3
16.10.00.03 Teradata Parallel Transporter Base 16.10.0.3
16.10.00.03 Teradata Parallel Transporter Base nt-x8664 16.10.0.3
16.10.00.03 Teradata Parallel Transporter Stream 16.10.0.3
16.10.00.03 Teradata Parallel Transporter Stream nt-x8664 16.10.0.3
16.10.00.03 Teradata TPump 16.10.0.3
16.10.00.05 Teradata CLIv2 16.10.0.5
16.10.00.05 Teradata CLIv2 nt-x8664 16.10.0.5
16.10.00.05 Teradata GSS Administration Package nt-i386 16.10.0.5
16.10.00.05 Teradata GSS Administration Package nt-x8664 16.10.0.5
16.10.05.00 Teradata Tools and Utilities - Base 16.10.05

and Attunity connectors 5.0. My OS is Microsoft Windows 7 Enterprise SP1, 64 bit.
We're running Teradata Database 15.10.

In my existing SSIS package, my connectors using the .NET data provider for Tdata works fine.

My MSTera connection manager returns an ODBC error:
Failed to establish an ODBC connection with the database server. Verify that the Teradata ODBC Driver for Windows x86 is installed properly. SqlState = IM002 Message = [Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified
at Microsoft.SqlServer.Dts.Runtime.ConnectionManager. AcquireConnection(Object txn)
at Attunity.IntegrationServices.DataFlowUI.TeraDataUI .TeraConnectionDialog.testConBtn_Click(Object sender, EventArgs e)


I can connect using SQLA via ODBC and using linked tables in MSAccess via ODBC.

What do I need to change to get my SSIS package to work with the Attunity connector so I can use a Tdata destination data flow object?

Thanks for your help.

fyi, I've tried setting the project Run64BitRuntime property to both True and False, and changed the project TargetServerVersion property to SQL Server 2017.