I have found that this data is stored in the Inv_Software_Product_Usage table, but only when that option has been enabled.
The following query will display you details about that table:
SELECT p.Name AS SoftwareProduct,u.UsageCount,u.IsUsageTracked,u.TrackingStartDate
FROM RM_ResourceSoftware_Product p
JOIN Inv_Software_Product_Usage u ON u._ResourceGuid = p.[Guid]
ORDER BY p.Name ASC
The following query will disable that option for all Software Products that have it enabled:
UPDATE Inv_Software_Product_Usage
SET IsUsageTracked = '0'
WHERE IsUsageTracked = '1'