Where to enter a new license key

I bought a new license. Where should I type this? I can not find it.

First install GlassWire, then go to its top left menu where it says “GlassWire” and choose “Activate”.

If GlassWire is already activated then it will say “Deactivate” and it means it’s already activated for you.

activate

https://www.glasswire.com/quickstartguide/