How to replace Zigbee USB stick?

I am trying to replace my cheap Itead zigbee stick (which has been integrated into ZHA) with the Sonoff zigbee 3.0 usb dongle plus. I swapped the sticks and HASS doesn’t auto-discover the new stick. I then deleted ZHA and rebooted, but still can’t find the stick. Manually trying to add it doesn’t work either. What am I doing wrong?