The scripts that usually fail are those that are compiled PYC.  If they are left uncompiled they should work unless there is a change to the syntax rules, and even then, it would be  fairly simple to fix the error.  If not the that user then they could ask and someone can give the fix in a post.  The same thing happened to PE when Poser 11 came out.  The script was setup to work with Poser 9 OR Poser 10.  By changing a single line in the script it was possible for it to work with 9 OR 10+.

Poser 5, 6, 7, 8, Poser Pro 9 (2012), 10 (2014), 11, 12, 13