homepage Forums Air Combat & Civil Aviation Wings: Over Flanders Fields Wings: Over Flanders Fields - Mods Mission Editor

I would recommend yout to uninstall Java and then download and install one of the JavaSE in accordance with your version of OS(I assume Windows x64).
Link: Java SE
That should help. If I remember well, one of Mission editor beta testers had the same issue and above method (Java SE installation) fixed it. Good luck and let me know result, pls.