Fixed my issue with a complete restore
Fixed my issue with a complete restore from a backup I had from a month ago.
Following my complete restore this morning I received a response to my question on the Adobe forum and if anyone has this similar issue in the future then try this. Someone said it worked for them that was having this problem.
"Maybe there are some flash-based softwares installed in your machine conflict with Extension Manager. You can try to move all files under "C:\Users\<YourUserName>\AppData\Roaming\Macromedia\Flash Player\#Security\FlashPlayerTrust" to somewhere, then launch Extension Manager. If it worked, You can move those files back one by one to isolate the software which causes this issue."