Index: helpers.py
==================================================================
--- helpers.py
+++ helpers.py
@@ -10,10 +10,11 @@
 
 class cd:
     "Context manager for changing the current working directory"
     def __init__ (self, newPath):
         self.newPath = os.path.expanduser(newPath)
+        self.savedPath = ""
 
     def __enter__ (self):
         self.savedPath = os.getcwd()
         os.chdir(self.newPath)
 
@@ -45,11 +46,11 @@
         try:
             if os.path.isfile(spf):
                 os.unlink(spf)
             elif os.path.isdir(spf):
                 shutil.rmtree(spf)
-        except Exception as e:
+        except (OSError, shutil.Error) as e:
             print(e)
 
 
 def createCleanFolder (sp):
     "make an empty folder or erase its content if not empty"