Imatest does not support international characters in file name paths. Using files with international characters will corrupt the Imatest INI file and lead to an INI file error.
You should only use folders and filenames with latin characters or you will encounter this problem.
Resetting your Imatest INI is the easiest way to solve this problems. You can do this through the following menu entry:
This will remove the settings that you have made within imatest.
To correct the problems with your INI File you can follow the troubleshooting information information available here