I was just experimenting getting another computer to run some Data Exchange tasks, so I copied the ini files from a laptop to the desktop, set up ODBC through Administrative Tools, and then tried to test it out.
Unfortunately every time I try to export the data it comes back with the fatal error: "Could not get DB Connection to jdbc:odbc:, user:"
The annoying thing is that it stopped working on the laptop as well, which performed a data import successfully just yesterday. I've looked through the ini file and found nothing was changed. The Import mapping on the laptop didn't have anything wrong either.
Found the problem: I have to keep the Excel file open at all times when performing a data exchange. I generally edit the data before a real import which is probably why I thought it was a non-issue whether the excel file was active or not. Oh well, future reference for everyone :)