I do not have the H145 so this is just based on logic and a few possible assumptions…
From your description it appears you have run through a license activation process that says it has been completed successfully, but despite that you are unable to take off?
If not and for some reason the activation process either fails or keeps repeating I would suggest you would be better off contacting the developer directly.
I assume you have done the obvious like started from the runway so the helicopter is configured for flight? If not it might be something like you have not advance the helicopter throttle before trying to raise the collective to take off.
Have you checked the documentation what (if any) control assignments may be needed? And/or for that matter ensured your controls actually move the controls in the helicopter?