Unfortunately Thinstuff RDC has been discontinued and won't be updated anymore.
RDC is based on FreeRDP - iFreeRDP (alternative to RDC) and aFreeRDP - are an open source community project.
So to clarify its not a "Thinstuff RDP client" it's the FreeRDP client for iOS/Android where Thinstuff sponsored the development.
As mentioned above FreeRDP is a community project we currently don't provide private/customer support for it.
Contact the FreeRDP mailing list, irc channel, wiki or issue tracker.
Please refer to: