Hi Gunter,

IMHO:
The UnwrapCurve is a superb "non-stock" script which Michael created.

When installing a new Beta, or upgrading, the "non-stock" scripts are not added to the new regular MoI command folder.
So I would suggest placing the UnwrapCurve script in your %AppData%\commands directory, so the script is preserved for a new Beta.

- Brian

For Mac, for the %AppData% location, see: http://moi3d.com/forum/index.php?webtag=MOI&msg=6507.404

("non-stock" is not official MoI terminology:-)
Burrman made a list of Commands, and a list of Scripts...