There is an option to enter a promotion code. However, I do not think that is the same as a license, and again I am unaware of how to get them anyhow.
другого аккаунта войду?
Generally, you can NOT share licenses between different accounts.
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Make sure you install the PRO version from the play store, using the same account that you used to purchase the initial one. It should automatically see the valid license.
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