I second the recommendation for Auto-It if you can't export in a delimited format (tabs, pipes or commas for instance).

The delimited export and import would be by far the fastest with an almost instant transformation of all the text using Ultra Edit or TextPad as two examples.

Auto-It is pretty straight forward, especially if the controls you need to click through are named. I've used it to great effect for transforming and moving data between three programs and to and from two disk-based files. Powerful and intuitive. I wish it existed for Mac OS actually.

Depending on how savvy you are with basic programming logic, Auto-It may or may not save you a great deal of time. It may take you 30 minutes or more to write and test your automation script, so keep that in mind.