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|I have activated my license, but after I reinstalled OS, the program runs as the free version.|
Formatting your PC and reinstalling OS can lead to your license being deactivated.
To check your license activation, save information during installation that can identify your PC.
As all your data including your license details were removed in the process of reinstalling OS, the program sees your license deactivated and runs as the free version.
In this case, deactivate and reactivate your license.
See [User Guide] for how to deactivate license.