Operating system: Windows 7 Pro SP1
Graphics card: GTX-970
v 2.82 Alpha Date : 2019-11-19 18:55 Hash : 9ca2cbdcea6a
Short description of error
Restoring Animation Internal player not OK.
Exact steps for others to reproduce the error
Blender Preferences / File Paths / Applications
I changed the internal player from "Internal" to "Custom" (for MPC = Media Player Classic).
Not satisfied (because MPC doesnt play image sequence), I reverted to "Internal".
Then, I got a MPC window reporting error. (The "Internal" player was thus not restored).
I had to revert once again to "Custom" and delete the MPC path, in order to get "Internal" player back OK.
I did not try in 2.80 or 2.81, but I guess it's the same...