Here are the specs of what we were doing and seeing. Maybe it will help someone else with this aggravating situation. I find it unfathomable that legacy software can't be made available. Some engineer or tech certainly would have it, just not sharing it. I tried a couple of times and ran into a very polite stone wall.
Host Computer being accessed
Alex’s MacPro OS 10.11.6
Logmein Host v4.1.0.10893
Logmein Client 4.1.5267
Client Computer accessing the above
Mac OS 10.12.6
Logmein Client 4.1.7585 Plugin 1.0.2643
Error Message: You can’t use this version of the app “LogMein Client” with this verson of MacOS
requires 10.13 or later