You can process your commissions by going to the Admin Control Panel and clicking on "Manage Commissions".
A page will load showing you the list of outstanding commissions. You first need to click on the "Process Commissions" button link. This will write the Commission Paid Date into the Commissions table in the database. It will also copy these commissions into a Commissions Paid Table.
You can view the last batch of commissions paid at any time by clicking on the "View Last Commission List" Button link in the Admin Control Panel. NOTE: this table is cleared every time you process a batch of commissions, so that only the last batch is stored.
There is still however a record of when every commission was paid stored in the Commissions table.