I think AR is a PICK database, which is also called a multi valued database.  This database system violates first normal form.  I had to do the same thing with another PICK database at an old job.  The vendor provided a ODBC driver, but they also had to write some sort of translation layer to remove the first normal form violation.

 

In the end with a table of 1.5 million rows, it never worked.  Microsoft DTS was able to select * from table for all the tables.  So we created a datamart and had DTS populate it each night.  Also they did not date the records so a delta was not an option.

 

The ODBC driver had a memory leak.  So I did some searching for another option.  There are vendors out there, but you will still need to deal with the First normal form violation.

 

You might want to think about exporting your data to a text file and then importing it into SQL Mysql postgress or Oracle with an ETL tool like DI DTS or SSIS.

 

I did a Google search and came up with this company.  I know nothing about them.