fix index calculation in remove

labygui.py

@@ -29,8 +29,9 @@ def add(event):
 def remove(event):
   global path, index
   if len(path) > 1:
-    index -= 1
     path = path[:-1]
+    if index > len(path) - 1:
+      index = len(path) - 1
     aller_selon(path)
 
 def next(event):