Thank you for all the assistance. I grabbed .78 and I'll use that instead. Any thing (MAMECLR) that you already state is difficult to use is probably NOT worth investing the time in for a one time setup for a quick mess around box attached to the TV. All I really wanted to do with my PI 3 was replace the HUGE 'media center' PC that has been taking up space in the living room with something that might play a couple of games and allow surfing on my slightly older app filled but not 'smart' TV.
Thank you again for the assistance and for all of your work on this project. I may tinker with it later and become proficient, but at this point I just want to plunk down and play some Galaga and Dig Dug. Thanks for the information on how to find out what is installed as default. I appreciate that as well.