To upgrade your free online bundling account to a SOLO account, navigate to the "My Account" page, which can be used to manage your account.
On your account page you will see an "Upgrade" tab, click this to begin the upgrade process.
This will show you the upgrade options and their benefits. You can use the toggle at the top to switch between a monthly and a annual subscription.
After choosing your subscription click the "Upgrade" button. You will then be asked for your country and company name. Once you have filled these out, click "Upgrade".
You will then see a page which breaks down the cost of the account upgrade and also an area for you to fill out your card details for the payment.
Once this has been completed, you will be greeted with a screen acknowledging the account upgrade. You will also receive an email with details of your purchase.