Chaminda,
Thanks for choosing CanvasJS. I checked the status of the payment, it looks like the status of the order made through PayPal states authorized but not completed.
Once it is completed you can download the Commercial Version from Account Page.
Usually, it takes few minutes to complete the process in rare cases it is delayed.
Also, I will send you a Commercial Version through email mentioned while purchasing the License. Please check your email and download the commercial version.
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Indranil Deo,
Team CanvasJS