• Click on the account dropdown button in the top right corner of any screen and select ‘Settings' 
• From the ‘General’ section, click ‘edit’ next to your current location
• Make the necessary changes and click ‘Submit’

From the iOS app:

• Tap 'Profile' on the bottom right corner of the screen, then tap on your name at the top
• Tap the arrow next to your location to change it
• Then, tap ‘Current location’ or search for your new location
• When you’re done, tap ‘Save’ in the top right corner of the screen

From the Android app:

• Tap the ellipses button in the top right corner of the screen and tap your existing location
• From your profile page, tap the location under your name and enter your new location
• Once you’ve selected your new location, it will be changed