How do you update the game in pc or laptop? Do you download the new version and it will automatically update?

No.

1. You download and un-zip/pac just normal. Copy the new version of the game in the same folder next to the old version. 

2. Go into the "game" folder of the old version and copy paste the entire "saves" folder into the "game" folder of the new version.

3. Start the new version and and check if all your saves and scene in gallery from the old version are ok. If succesful you may or may not delete the old version.

Alright, thank you very much!