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+====== How to close the NeuroElf GUI after clearing everything ======
+===== Motivation =====
+Sometimes you accidentally enter
+<code matlab clearclasses.m>clear classes</code>
+which then, inadvertently, also clears the contents of all displayed objects, which makes Matlab (due to the GUI's callbacks) go haywire and spit out tons of errors and warnings.
+===== Solution =====
+To get a true fresh start, you first need to close the GUI (without invoking any further callbacks). To do so, enter
+<code matlab clearfiguresandclasses.m>% get a handle to the xfigure class (default constructor)
+xfig = xfigure;
+% then delete all objects without further ado
+xfig.DeleteAllFigures;
+% and *then* get a fresh start
+clear classes;</code>