Hello,
Thank you for your post.
Seeing if there's a warning message is the only way to judge whether the license has been applied successfully because using the commercial version without a license would absolutely generate a warning message in the output file.
In your case, you could first see if you are using the free version or commercial version according to the dll version. If you have confirmed that you are using the commercial version and there's no warning message in the output file, then the license works.
If the license did not work when using the commercial version, you would see a warning message in the top of the generated file like below.
1.png
Sincerely,
Jane
E-iceblue support team
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