Hello Riya,
We only allow one license registered to one particular email address and license can be used only on one PC. If you want to use it again, you need to try it on different PC.
If you use it for longer duration, I urge you to lease the license.
If you are a student, please register for student license by clicking on the link below, follow the instructions, and apply for the license:
Getting an Optiwave Student License
Let us know if you need any assistance with acquiring license?
Best,
Saurabh
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