All questions regarding OpenAD should be directed to the mailing list for algorithmic differentiation at Argonne's MCS Division:
The e-mails go to the current members of the AD group at MCS which as a group has taken over the responsibility for maintenance and future development of OpenAD.
While the previous main developers of OpenAD no longer work on the project and its applications in a regular manner, they may be able answer specific questions in their spare time: