I use this sql to clear stats periodically (to keep the db size down)
EXEC [dbname].[dbo].[_spKartrisDB_DisableAllTriggers]
DELETE FROM [dbname].[dbo].[tblKartrisStatistics]
WHERE ST_ID > 8445782
GO
EXEC [dbname].[dbo].[_spKartrisDB_EnableAllTriggers]
You don't need to worry about triggers in V2 as these were removed. The ST_ID is the lowest you want to remove to.