Good question. I did a clean Aurora install on our server when I built my latest computers back in the Fall of '08. Didn't concern myself with the databases at the time (all we used were text (drop in) DBs since Athena didn't have a comps db like Aurora does).
I poked around my Aurora install, and the only DBs, and DB references I could find were SQL scripts in the database folder of Aurora. I may be mistaken, but I do not think that Athena used the SQL-style database, and instead, used regular old MS Access MDB-style databases. I also found no "conversion" application hidden among all the little helper apps in the WinTotal folder(s).
You can try this, once you have Aurora running:
1) Open the main WinTotal folder/directory where WinTotal Aurora is installed.
2) Scroll down beyond all the folders (Files, Network, PDFiles, etc) to where just the application files are.
3) Look for the application called "Sys2k32.exe" (its icon is a wrench, hammer and red cross) - Double click that icon. The "WinTotal Tech Support Assitant" will open. Click on the bottom option "WinTotal Utilities" and hit "Next". There are many "database" utilities in there. Most likely, you need to scroll down on the Left List (of the 2 lists), to #18: "Athena Database Conversion Utilities".
There are several database utility apps in that Tech Support tool - if the Athena conversion stuff doesn't work for you, maybe some of the others will.