just keep the plan you tried. We will charge you the monthly price, with the credit card info you provided when subscribing to the trial. Obviously all orders and sales data retrieved in the trial period will still be there.
downgrade your previous plan. The sales data for the applications you registered during the trial will be kept and you'll still be able to see all reports and analysis, but within the limits of your plan. You will lose advanced reports and features.
Please refer to the Features & Pricing page to compare the different plans, and contact us for further questions.