Updating...

[jebthereb]

I haven't updated since I bought game....still using Alpha12. To update, I need to completely delete Alpha12 or just the data file? Will  be able to use saved games from 12 on 15?

[harpo99999]

as you were using a12 (assuming you did download it from sendowl), just download the latest version from the SAME link that you got the a12 from, (it will be a zip file), then extract the zip to the same folder that contains the a12 folder, this will create a new a15c folder, inside the new a15c folder you will see a rimworld1284xxx program, run the rimworld program