diff --git a/ed_lrr_gui/config.py b/ed_lrr_gui/config.py
index 9720f2d..6bf3d79 100644
--- a/ed_lrr_gui/config.py
+++ b/ed_lrr_gui/config.py
@@ -1,46 +1,46 @@
 import pathlib
 from collections import namedtuple
-
+import profig
 import appdirs
-import yaml
+import os
 
-config_dir = pathlib.Path(appdirs.user_config_dir("ED_LRR"))
+config_dir = pathlib.Path(appdirs.user_config_dir("ED_LRR", ""))
 config_dir.mkdir(parents=True, exist_ok=True)
-config_file = config_dir / "config.yml"
+config_file = config_dir / "config.ini"
 config_file.touch()
 
-data_dir = pathlib.Path(appdirs.user_data_dir("ED_LRR"))
-data_dir.mkdir(parents=True, exist_ok=True)
+cfg = profig.Config(str(config_file), strict=True)
 
+cfg.init("history.bodies_url", [], "path_list", comment="history of bodies.json urls")
+cfg.init("history.systems_url", [], "path_list", comment="history of systems.json urls")
+cfg.init(
+    "history.bodies_path",
+    [],
+    "path_list",
+    comment="history of bodies.json download paths",
+)
+cfg.init(
+    "history.systems_path",
+    [],
+    "path_list",
+    comment="history of systems.json download paths",
+)
+cfg.init(
+    "history.out_path",
+    [],
+    "path_list",
+    comment="history of output paths (stars.csv and precomputed graphs)",
+)
+cfg.init("route.range", 7.56, comment="jump range")
+cfg.init("route.primary", False, comment="only route through primary stars")
+cfg.init("route.mode", "bfs", comment="routing mode")
+cfg.init(
+    "route.prune.min_improvement",
+    10.0,
+    comment="path needs to improve by at least (jump_range*min_improvement) in route.prune.steps",
+)
+cfg.init("route.prune.steps", 5, comment="number of steps before path gets pruned")
+cfg.init("route.greediness", 0.5, comment="A* greediness")
+cfg.init("folders.data_dir", os.path.join(config_dir, "data"), comment="Data directory")
 
-def make_config():
-    return {
-        "history_bodies_url": [],
-        "history_systems_url": [],
-        "history_bodies_path": [],
-        "history_systems_path": [],
-        "history_out_path": [],
-        "range": None,
-        "primary": False,
-        "mode": "bfs",
-        "greedyness": 0.5,
-    }
-
-
-def write(cfg):
-    with config_file.open("w", encoding="utf-8") as of:
-        yaml.dump(cfg._asdict(), of, default_flow_style=False)
-
-
-def load():
-    data = yaml.load(config_file.open(encoding="utf-8"), Loader=yaml.Loader)
-    if data is None:
-        data = make_config()
-        write(data)
-
-    return namedtuple("Config", data)(**data)
-
-
-# print("CFG:", yaml.load_config())
-# print(config_file, data_dir)
-# exit(1)
+cfg.sync()