If you have turned off auto-renew for the Free Trial or voucher before it ended and you want to restart your Plus membership, follow these steps.
1. Click on "Settings" in the bottom left corner.
2. Here you'll see your current plan, payment method and a section that says "Auto-Renew". Click "Turn Auto Renew On". Click the blue checkbox to de-select auto-renew. Then click "Save Changes".
3. Click the checkbox to select auto-renew. Then click "Save Changes".
4. Auto-renew is now turned back on and your account will be charged and fully upgraded at the end of your term. If it has already expired, you will be charged immediately.