Thanks for the info Rob!
I tried installing it again without copying the master0.lic file and when I double clicked on the Master application file... nothing happened. The computer whirred for a second lie it was attempting to launch the program and the nothing happened. I repeatedly tried to get the file to launch but it just went flat..nada..like something was missing from the launch sequence. At the moment I reinstalled 19.5e and will use that until I can figure out what is going on. I'm glad to hear nobody else is having this problem..