Using Acrobat reader XI, you can get an error message saying there is an error displaying a page.
Installing Acrobat reader DC solves this.

On a windows7 64-bit machine, there is a known issue in the 1.6.0 and later versions with the post-installer step that occasionally fails to create the executable.

UPDATE: The problem has been seen also with the 2.0.0 version. It's related to the rights of the folder from which the installer is run. Running it from e.g. C:/ gives the problem, even when it's ran as Adminstrator, while executing the same installer from the default user's Downloads folder (C:/Users/<username>/Downloads) works ok.

If that still would fail:

You can still run the ConfigFileEditor by executing java -jar jar/coupe.jar from the install directory or doubleclick the coupe.jar executable jar located in the jar subfolder of the install directory.

 

Using Windows, if saving a new MIB to the database fails, you typically get an error popup stating "java.io.FileNotFoundException .... (Access is denied)".

This is because the MIB database (MIBS.INI file) is located in the install directory, typically C:\Program Files\...

If you are a regular user (non-administrator), you don't have write access to that directory, hence the "Access is denied" error.

Two solutions:

1. Run the program as an administrator. Right-click the desktop shortcut, and select "Run as administrator"
   
2. Install the program in a non-default location where you have write access as a user (e.g. D:\)

Note that this issue also holds true for saving config files into system directories.