A simple script to find all the cards in the current folder, and then pass them one by one to CharaCardConv_KKStoKK.exe for execution.
First, you'll need CharaCardConv_KKStoKK.exe, of course. You can download it here.
Then put everything together, and run the script.
The script is quite straightforward, as shown below:
@echo off
for %%f in (*.png) do (
start /B CharaCardConv_KKStoKK.exe "%%f" > nul
)
echo All done!
pause