exportToPNG / exportToPDF IE10 popup window not close

when i export PNG or PDF
create new popup windows (IE10) but popup window not close

chrome is auto close

i want like chrome, how do I ?

ex ) I bought gantt Chart pro lisence


Is the issue occur for default samples or only in your app ?
Can you repeat it on the different PC, or only on one ?

I have checked the default samples, and export functionality works correctly for me in IE10.