Redeem a Helperbird Pro voucher.
Step 1: Copy the voucher code from your email or that you received.
Step 2: Follow the link here for a special signup page.
Step 3: Paste your voucher code into the Add promotion code field.
Step 4: The price will change to $0.00.
Step 5: Enter your email address and click Start Trial.
Step 6: You will receive an email with your account being upgraded to Helperbird Pro.