I tried this in single player full screen 800x600 with plugy 10, and had couple of problems even though I did (in admin mode) do the setup and actual application. Setup said everything is fine and ready but;
1) It drags my test runes to empty slot in my stash but it doesn't drop them.
2) When i open my cube it tries to drag the runes on the same spot where my stash would have empty bottom slot open but as cube is smaller than the stash it's trying to drop them just over the closing button which doesn't have any slots to drop it to.
edit: Was using the wrong .exe

the other .exe moves the first rune as it should, but if i try to move another rune it tries to drop it on top of the first rune, same problem wich cube still.
edit#2: It seems to work alright in windowed mode, but in fullscreen the problems arrive.