I bought one of these Toyota 820's used. The guy gave me the whole computer that had the Communications Driver utility (PMCCOMM) by Pantograms Mfg, Co., Inc (1998) and the Pantograms software on it to actuall transfer to the unit. The Pantrograms software is called "Design File Manager".
The Pantograms software and i believe Communications driver both appear to have dongles (Hardware locks).
I couldn't come to terms using and being stuck with an old windows 95 machine. The Hard disk is past its useful life. So this is what i did it took me forever to get it right.