I saw that uptade 1.1.8.2 has just been released I downloaded the 1.1.8 version of the game with the launcher how can I upgrade it to the newest version without losing my data
If you’re on Windows, your save data is in a different place and you don’t lose your data. All you have to do is download the new core and run it (you can delete the old folder).
If you’re on a Mac, you have to find your save data and copy it to the new folder. Your save location can be found here: http://p-insurgence.com/FAQ/bugs.html
Simply download and play the core always?
If you’re on Windows, yes.