Also, if you have Poser 11, the update is free. If you don't, but you had Poser 2014 AND you want the new version, like with any other software, you have to pay for the upgrade you did not have before (and the price is a lot cheaper than it used to be, actually). If you had PP2014 Game Dev version, the update is, again, free. No one is forcing anyone to update an older version if they don't want to--but it is a good practice, as gate has said above, to keep backup copies on a separate drive.