Managed to fix the signature/offset for Linux, open up sourcetvmanager.games.txt and look for the following:
- CHLTVServer::m_DemoRecorder (under "Offsets") - change 38 to 43
- CHLTVServer_DemoRecorderRef (under "Signatures) - change to \x55\x89\xE5\x57\x56\x53\x83\xEC\x4C\x8B\x75\ x08\x0F\xB6\x45\x0C
Stopped hosting servers as of November 2018, no longer active around here.