Detailed steps on how to deactivate Steelcentral AppResponse 11 VE license with no internet connection is provided in Steelcentral AppResponse 11 VE Installation Guide Pg 33 - 35,
The guide is available on Riverbed support site at
https://support.riverbed.com/bin/support/static/tv0kpias6m381giv2esjv44tc4/html/t3uv1cvditnt9jhog87i0nnjba/AppResponse_11_VE_ESXi_Installation_Guide/index.html
TAC Escalation Engineer (EE) will be able to assist.