You need to establish an ODBC connection to *each* year/module combination.  18/IND cannot read--nor even see--files in a 17/IND folder.
  If you have all of your data in a single directory (call it "18data"), then you will see several DBF files, one for each module.  18idata1, 18Fdata1, 18Pdata1, 18Sdata1, and so on.  In this case, while making the ODBC specification, you *will* need to put in the "year" and "module" indicators in the dialog box.
  If you have each module broken out to its own directory--18idata, 18Fdata, 18Pdata, and so on--then you will *not* be required to make that year/module designation in the dialog box.  (Because there is only a single year & type of data being looked at.)

I believe this was spelled out on page nine (9) [??] of the PDF manual.

Once you have the connections specified, you will be able to open your 18/IND data with that connection, and your 18/PAR data with that one.  Repeat as needed.