You can easily upgrade from a monthly to another monthly plan by visiting your accusonus account.
1) Login to your accusonus account.
2) Under the Subscriptions tab you can view and Manage your active Subscriptions.
3) By selecting Upgrade you are able to view the available plans that you can upgrade to.
4) You can then select your preferred new plan by clicking on Buy now.
5) Your subscription to the new plan will start immediately and you will be charged with the relevant amount.
By upgrading to a different monthly plan your subscription will be valid until the end of your current monthly billing cycle and your new plan will start immediately. You will also receive an invoice with the price difference between the two plans.
You started a monthly subscription to ERA Bundle Pro ($49.99/month) that activated on November 10th. You decide to upgrade to the All Access Suite ($59.99/month) on November 20th. You will be charged on the date the upgrade takes place, with the price difference between the two plans. This charge will be automatically calculated based on when the upgrade takes place. It will certainly be under $10 (=$49.99-$39) and the plan will be valid until December 10th.