When installing the game, it prompts you 2 times on 2 separate pages of the installation menu. Ignore it the first time, change it on the 2nd time. I had the same issue, but just continue to the next page. This user explains it better:
When installing the game, it prompts you 2 times on 2 separate pages of the installation menu. Ignore it the first time, change it on the 2nd time. I had the same issue, but just continue to the next page. This user explains it better: