Hi Everyone,
I was able to clean out the Libraries Manager entries by copying all of the files from my additional libraries folder to another folder I created and pointed the additional libraries path to that new folder.
As far as compiling the v1.7 Material Date Time Picker, that still would not compile so I tried v1.52 and that would compile. I wanted to see which of the 3 files would be the problem. I copied the .jar and that worked. Also copying the .xml worked. It was when I copied the .aar it crashed when compiling so it looks like a bug in the .aar file. I hope they can fix that sometime soon.