How do I resolve this?

Good day. Pls I mistakenly downloaded autoloader 3.11.0 to downgrade my z10 cos I couldn’t remember the bb id n password. While loading it when it had gotten to 43, there was power cut and now it just blinks the red light 3times pauses for 2seconds then blinks 2times and it repeats that process continously. Pls how can I solve this problem?

You can't go back to a previous version anyway. You have to load 10.3.3 again and hope to remember your BBID.