Yes, you can download your Metal Keycard again in Metal Vault. Follow the steps below to export your keycard.
Step 1: Go to the settings page
Click on "Settings" on the left sidebar menu. You will be taken to the settings page.
Step 2: Go to the export keycard page
Click on "Export Keycard" on the inner left sidebar menu. You will be taken to the Export Keycard page.
Step 3: Export your Metal Keycard
Write your account password (the same password you used for signing up for Metal Vault) in the "Account Password" field and click on the "Export Keycard" button to export your keycard.