Hi Matadem,

re:
> Is there a script to select all of them at once?

I don't know of one that tries to compare the shaping but you can do Scene Browser > Types > Curves > Polylines to select all curves made up of line segments:







If the similar shapes have been made by copying an object, you could assign the object a name before you copy it and then all objects with that name could be selected by the object name inside the "Objects" section of the scene browser.

- Michael