update folder creation

MultiExport.FCMacro

@@ -30,7 +30,7 @@ class ObjectListItem(QWidget):
 class WindowDialog():
 	def __init__(self):
 		self.selectedItems = []
-		self.outputRacine = self._createFolder()
+		self.outputRacine = ""
 		self.ui_file = os.path.join(FreeCAD.getUserMacroDir(True), 'MultiExport/MultiExport.ui')
 		self.form = FreeCADGui.PySideUic.loadUi(self.ui_file)
 		self._connect_widgets()
@@ -293,6 +293,8 @@ class WindowDialog():
 		isCalepinage = self.form.checkBoxCalepinage.isChecked()
 		isCombine = self.form.checkBoxCombine.isChecked()
 
+		self.outputRacine = self._createFolder()
+
 		self.exportSVG(isCalepinage)
 		self.exportSTL(isCombine)