Link to French version: Configuration manuelle du proxy dans Momindum Maker
...
Note : The Windows button shows the Windows logo and can be found to the left of your keyboard, but to the right of the ctrl key.
B – Type inetcpl.cpl ,4 into the field and then press OK.
This Internet properties windows is also accessible via the following path: Control Panel => Network and Internet => Internet Options
C – Go to the Connections tab and click on the Network Settings button.
D – Retrieve the proxy's URL and port.
WARNING
If the Use as an automatic configuration script box is checked, then you must contact your IT department to retrieve the URL and port of your proxy to continue. . 
E – Open Momindum Maker and go to Network Settings
F – Input the proxy information previously retrieved in the host and port fields and click Save.
