Tiedbook
Import NinjaTrader
Executions export.
From the NinjaTrader 8 Executions tab, export the grid to CSV. That file is Supported. The Trade Performance Trades tab is Beta, because the columns are whichever ones you left visible.
A repeated execution ID is skipped as a duplicate.
If the Commission column is filled in, including an explicit 0 on one side, those figures are used. If the column is empty, the account preset is applied.