Seems to be fixed in Build Fri Feb 19 15:12:44 CET 2016.
There's still the INFO-line in Gui.log after ever restore,
Code:
--ID:26TS:1455898015103-2/19/16 5:06:55 PM - [jd.gui.swing.jdgui.JDGui$36(edtRun)] -> Bad ExtendedState
7
--ID:26TS:1455898015104-2/19/16 5:06:55 PM - [jd.gui.swing.jdgui.JDGui$36(edtRun)] -> Reset frame to
null
but no more NullPointerException in Log.L.log and restore works too.
Thanks.