Changed wifi zones - how to update imp

I successfully connected and worked with my Imp in one wifi zone.

Now, however, I have moved to another wifi zone. I want to blink-up my Imp but all it does is Blink red at 1 Hz (clearly trying to connect to the old network.)

It won’t accept any new blinkup. How do I reset my Imp?

trying to connect to the old network, it blinks orange/red
when it is blinking red, you can blink-up, in an as dark possible surrounding.

Ah, thanks. I just needed to sync in a darker place.