…and the bad news is that I became fed up with that, so went back to breaking yours.
Started from scratch.
Saved as soon as new file created.
Got as far as you see in the attached image.
(When I reloaded Cran Winbuttons.ini, the entry -subAIpanel.ini came with it even though I'd not entered it — had in a previous, differently named .ini).
I saved again at the point you see and thus incurred the wrath of the error gods yet again
At this point, after the crash, Cran Winbuttons.ini consists of:
winsendkeys=WinSendKeys.exe.DONE: On Screen Button That Sends Keyboard Commands
For a modest fee I'm willing to go away and leave you alone.