Depends on if the strategy has changed or not.

If it has not changed, just stop trading the old system, do not close trades when asked, close Zorro, install 1.04 in the same folder, start the new Zorro and continue trading.

If it has changed, like Z1 and Z2, you can not continue open trades. So you need to end the old trades. The best way is setting the Margin slider to 0 and waiting until all trades are closed, even if it takes a couple of days.