I forgot to look into running processes. Other applications, like Word, did work. I ran Malware Bytes on entire system and that took 3+ hours. I updated Malware Bytes just prior to running it. The update worked. No malware was reported. After that all my KMs ran OK.
I am thinking a hardware problem, but I don't know what failed. I don't know if hardware could make it appear the last KM did not close and starting another really started the same version again. I don't think this happened. I think I saw different window title versions each time, but I am old and maybe what I think I saw was different from what really happened.
I had another problem prior to this.
http://kmeleonbrowser.org/forum/read.php?3,111934 Three hours later I could not reproduce the problem.
Nobody else has reported anything like this, so that is why I am thinking my hardware and not KM software.