Everything is fine until I changed the preferences -> Externals -> coqtop in CoqIde and then I found myself in trouble launching CoqIde as the picture shows. It seems that I wrote the wrong path in the coqtop. I have tried to reinstall the coqplatform and It seems useless. So how can I restart my CoqIde?
On Windows the user configuration files of CoqIDE are in:
C:\Users\<Yourname>\AppData\Local\coq
Please note that AppData is typically a hidden folder, so you can't see it. Either enable display of hidden folders in file explorer or use the console.
You need to delete the file coqiderc
in this folder (or fix it with a text editor).