SOLVED: open your boards.txt file and add the code below...
(Windows 10 64 bit example)
(you may need to make hidden folders visible in the top menu section under the view tab)
- Open the boards.txt file
- Scroll down to the m5stick-c-plus section of code listed. At the very bottom of this section add the lines:
Notice the way this is listed for other boards like the stick-c and do the same. You can now use the stick-c plus board listed in the Arduino IDE! You could also just use the stick-c board listed but I had errors in third-party programs.