overwrite stackmax directory if --force

src/core.py

@@ -2,6 +2,7 @@ import sys
 import os
 import logging
 import os.path as op
+import shutil
 
 import numpy as num
 
@@ -26,6 +27,8 @@ def scan(
         if op.exists(config.detections_path):
             if force:
                 os.unlink(config.detections_path)
+                shutil.rmtree('stackmax')
+                os.mkdir('stackmax')
             else:
                 raise common.LassieError(
                     'detections file already exists: %s' % config.detections_path)