fix file access error and illegal path error

Global_Indexer/frmStart.vb

@@ -136,9 +136,25 @@ Public Class frmStart
         Catch ex As Exception
             LOGGER.Error(ex)
             MsgBox("Unexpected Error in Check_Dropped_Files:" & vbNewLine & ex.Message, MsgBoxStyle.Critical)
+
+        Finally
+            ' Clear all temp files after indexing
+            Clear_Tempfiles()
+            EMAIL.Clear_TempFiles()
         End Try
     End Sub
 
+    Private Sub Clear_Tempfiles()
+        'TempDateien löschen
+        For Each oFile In TEMP_FILES
+            Try
+                System.IO.File.Delete(oFile)
+            Catch ex As Exception
+                LOGGER.Error(ex)
+            End Try
+        Next
+    End Sub
+
     Sub Open_IndexDialog()
         Try
             Hide()