Hi there,
Thanks for the PM - I now have access to the system and have set a new password.

there definitely wasn't an osdm.exe on the SD card - there was a DM folder, but it was empty, so perhaps it was removed at some point by the previous owner of the system.

In any case, I'm in and able to start configuring now (well, tomorrow probably).

Many thanks for your help - I shall close this thread now.

Best,
James