When you install the driver from Mertech for your DataFlex version, it updates the DriverDef files for the Studio and the drivers.
That might be the problem Wil, I didn't "install" the driver on this new PC I'm using, I just copied over the DLLs & config files from the old box. Though the .xml file should also have been copied. At least this points me in a direction to try, thanks. I see that Mertech just released their newest 32-bit driver & Flex2SQL, I should probably give that a go. Thanks!