What version are you on. To revert back to another day, just copy all the data from a previous day.
I take it your not open for business, so loosing sales data won't be a problem.
In Windows, My Computer.
Browse to the Aloha Directory.
Either c:\aloha\ or c:\bootdrv\aloha or d:\aloha
right click on newdata folder select rename -
rename the newdata folder to olddata.
right click on 20110326 or a previous day that had good employee files rename the dated folder to newdata.
Go into Aloha - Maintnance - store settings - system, change the Date of Business to today's date.
Make employee changes adding your nre manager information, then under utilities - refresh data to send the updated information to the terminals.
Cheers,
Coorsman