Reversed polarity RX8 and back to life

Being not aware of reversed polarity of battery wires, I burnt the plug seriously.
The switch stayed off while this accident happened.
Then I checked the esc and no visual damage found.
I rewired the input wires and plug to my battery again.
The unit was back to life magically.
I wonder to know will it safe to use the esc?
Should I send it back to Tekin and have it inspected?