wine – Where can i find the files of exe installation?

There is a hidden directory “.wine” in your home directory.
So do

cd ~/.wine/

and in there is a Windows oriented directory structure.

Of if you want to do this from the file explorer: go to your home dir and do CONTROL H and it will show hidden files then navigate into the .wine directory.

Mind that you should be using the internal browser inside wine if you want to do anything with the EXE. Altering it from Ubuntu can/will corrupt the file.