computer play mode - undo move blocked on checkmate

Am I missing something?  It is very annoying that it seems you can't take back a move after the computer has checkmated you in the computer chess mode.  Being a dues paying member at $100/yr I'd expect to be given this option.

Well, by normal rules, checkmate wins the game so....

My guess is the code is set to terminate the engine play at checkmate. Have no idea what the code looks like for them doing that and if would easily support takeback of checkmate.

But if you paid $100 you have the wrong icon ... gold is only $30 a year

I use the following:

--> Learn

--> Analysis

--> Set Up Position

--> choose your color as "White to move" or "Black to move" and configure the board in the way you would like to continue from

--> Load

--> Practice vs Computer (the dart board icon on the bottom right)

--> Change Bot (the robot head looking icon on the bottom right -- this is also optional)

Hope this helps!