The last version of GreasySpoon is the release 1.0.10. See changelog for details.
Several critical security issues that can result in a full server compromission have been identified in GreasySpoon releases 1.0.10 and older.
As discovered flaws would require a huge effort to be fixed, and because GreasySpoon project is no more active, application distribution is suspended for an indeterminate time.
GreasySpoon's users should consider switching ASAP to alternate solutions like WebflowAdapter.