You can double click on an obj in the Load obj window (in the World Editor, Object mode) to load it. The problem is that when you double click, the second click is registered as a click in the game world. So any object in the game world behind the Load obj window, and under your mouse cursor, is selected and the obj you just loaded is lost.

This happens quite often in a densely populated world with lots of objects. It is very frustrating as you always have to select with a single click and then click OK in the Load obj window. This is much slower than double clicking.

Thanks!

You can download the fix through the Autoupdate.