Kevin,
I'm no expert (actually a NEWBEE) but you might consider the following:
AWstats builds a stats file from the log files that apache produces. if the log files are still in tact (I believe they are NOT in the same directory with the AWstats file), you might be able to recover some if not all of the data if the log files have not been purged.
First I would suggest backing up everything.
Next, did you install AWstats or did you install the Neddix version that runs thru the sme server-manager?
After you determine which version you have, UNINSTALL it.
Next, go to
http://nx.dyndns.info/fs.php and click on AWStats 5.3 for SME Server. (this version will work on SME V5.1.2, 5.5, 5.6 only. This version ROCKS!!!
Install this latest version and let it re-build the stats files from the apache log files. This will take a long time if your log files are large (maybe even hours or days because it figures out every domain name).
Good Luck and let me know if this works,
Paul