The method is similar to Fast marching (works on a single segment, grows from a seed point). A potential advantage can be that it might be constrained to segment blob or star-shaped structures, so it might be less likely to leak.
In a number of files there are some ambiguous comments like “The code is for research use only”. If this means that the authors don’t take any responsibility for any errors that the code may have, then that’s fine. However, if they mean that they restrict usage of the extension then I would just abandon it.
@jcfr have you been able to contact the authors? Did they clarify what license they distribute this extension with?