You can withdraw your assets in one of two ways.
Option A (Recommended): Website withdrawal portal
Visit https://takeoff.app/export, sign in to your account to send each token in your balance to a wallet you control.
Option B: In app withdrawal for USDC
USDC withdrawals in the app are still supported. You may convert your assets to USDC in the app if you choose, and then withdraw directly to an external wallet.