Unable to connect to DB2 after upgrading to version 3.6 or above (4261875)

Upgrading from Toad Data Point version 3.5 to 3.6 and migrating settings. There is a default DB2 Client installed - version 9.7. However, on double-clicking a DB2 connection, one of the following messages may occur:

1. The alias name of this database was not found in the database directory.
2. Need More information to connect - Toad did not find a supported default DB2 client and Toad no longer includes one in the installer.
3. System.EntryPointNotFoundException  Unable to find an entry point named 'SQLFreeConnAttribsADONET' in DLL 'db2app.dll'.  Stack Trace:   at IBM.Data.DB2.UnsafeNativeMethods.
   DB232.SQLFreeConnAttribsADONET(DB2SQLGetConnAttribsADONETParams& pParam)   at IBM.Data.DB2.ConnSettingsFromXmlConfig.Dispose(Boolean disposing)
     at IBM.Data.DB2.ConnSettingsFromXmlConfig.Finalize()