Re: [Bug] Trial only despite having a disc copy (Xbox)
@FlowMike94PLGood news. I was able to solve the issue, I did many actions and I am sure that most of them weren't necessary however I will describe the whole flow (read all the steps before repeating them):
1. I've deleted the game (again).
2. I've removed all Microsoft accounts from my Xbox. I had only two accounts (my GF and mine) and the trial version was downloaded from the Xbox store using one of them -- remember not just to sign out but remove accounts so you will need to enter credentials again in order to log in.
3. Login with your MS account on the Xbox (at this step I've logged to only one of the accounts).
4. Install the game from disk (it will show you the message that there is an update and download 43Gb from the internet, only 500Mb was installed from the disc).
5. After I've started the game and it was still a Trial version and not a full version of the game.
6. Sign out from your Xbox account (just sign out without removal) and restart the Xbox. During Xbox startup, you will be prompted to choose your account (the one you've used in step 3) or skip the step and proceed to the home screen. Choose skip so you won't be signed in to any of the Xbox accounts.
7. Start the game, during game startup you will be asked to choose an Xbox account, choose the one from step 3. By doing all this a had a full version of the game instead of the trial one.
P.S. I didn't disable the internet connection on my Xbox while performing the steps described above.