diff --git a/pdm.lock b/pdm.lock
index e482802..912c1ca 100644
--- a/pdm.lock
+++ b/pdm.lock
@@ -5,7 +5,7 @@
 groups = ["default", "dev", "lint", "nb", "tests"]
 strategy = ["inherit_metadata"]
 lock_version = "4.5.0"
-content_hash = "sha256:b66d3ee47e9636e1e92ea7537bb7d2795d91d77c2d80303a61b8da2fe0315570"
+content_hash = "sha256:4adb42a7279939be5798107003c3b108795194e4405ea5cda4ab67f048464df7"
 
 [[metadata.targets]]
 requires_python = ">=3.11,<3.14"
diff --git a/pyproject.toml b/pyproject.toml
index d758349..8ada1fa 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -5,7 +5,7 @@ description = "GUI for CRM of NAFKA project with WCE"
 authors = [
     {name = "d-opt GmbH, resp. Florian Förster", email = "f.foerster@d-opt.com"},
 ]
-dependencies = ["nicegui>=3.10.0", "pyside6>=6.11.0", "sqlalchemy>=2.0.49", "polars>=1.40.1", "dopt-basics>=0.2.5", "pydantic[email]>=2.13.4", "babel>=2.18.0"]
+dependencies = ["nicegui>=3.10.0", "pyside6>=6.11.0", "sqlalchemy>=2.0.49", "polars>=1.40.1", "dopt-basics>=0.2.5", "pydantic[email]>=2.13.4", "babel>=2.18.0", "python-dotenv>=1.2.2"]
 requires-python = "<3.14,>=3.11"
 readme = "README.md"
 license = {text = "LicenseRef-Proprietary"}
diff --git a/src/wce_crm/__init__.py b/src/wce_crm/__init__.py
index 5100c41..8b13789 100644
--- a/src/wce_crm/__init__.py
+++ b/src/wce_crm/__init__.py
@@ -1,3 +1 @@
-import wce_crm.env
 
-wce_crm.env.setup()
diff --git a/src/wce_crm/constants.py b/src/wce_crm/constants.py
index 505de27..ec515b3 100644
--- a/src/wce_crm/constants.py
+++ b/src/wce_crm/constants.py
@@ -1,6 +1,34 @@
 from __future__ import annotations
 
+import os
 from pathlib import Path
 from typing import Final
 
-LIB_PATH: Final[Path] = Path(__file__).parent
+import dotenv
+from dopt_basics import io as io_
+
+dotenv.load_dotenv()
+
+PROJECT_ROOT = Path(__file__).resolve().parents[2]
+LIB_PATH: Final[Path] = Path(__file__).resolve().parent
+
+DEV_DB_PATH = PROJECT_ROOT / "data/db"
+DEV_DB_KONTAKTLISTE = DEV_DB_PATH / "wce_kontaktliste.db"
+assert DEV_DB_KONTAKTLISTE.exists()
+DEV_DB_CRM = DEV_DB_PATH / "wce_crm.db"
+assert DEV_DB_CRM.exists()
+
+BASE_PATH = io_.search_folder_path(
+    LIB_PATH, stop_folder_name=os.getenv("DOPT_STOP_FOLDER_NAME", "python")
+)
+assert BASE_PATH
+
+
+class Config:
+    DB_PATH_CRM = BASE_PATH / os.getenv("DOPT_DB_CRM", "data/db/wce_crm.db")
+    DB_PATH_MAIN = BASE_PATH / os.getenv("DOPT_DB_MAIN", "data/db/wce_grunderfassung.db")
+
+
+# def setup():
+#     os.environ["DOPT_DB_KONTAKTLISTE"] = str(DEV_DB_KONTAKTLISTE)
+#     os.environ["DOPT_DB_CRM"] = str(DEV_DB_CRM)
diff --git a/src/wce_crm/env.py b/src/wce_crm/env.py
index 750207d..8b13789 100644
--- a/src/wce_crm/env.py
+++ b/src/wce_crm/env.py
@@ -1,15 +1 @@
-import os
-from pathlib import Path
 
-PROJECT_ROOT = Path(__file__).parents[2]
-DB_PATH = PROJECT_ROOT / "data/db"
-
-DB_KONTAKTLISTE = DB_PATH / "wce_kontaktliste.db"
-assert DB_KONTAKTLISTE.exists()
-DB_CRM = DB_PATH / "wce_crm.db"
-assert DB_CRM.exists()
-
-
-def setup():
-    os.environ["DOPT_DB_KONTAKTLISTE"] = str(DB_KONTAKTLISTE)
-    os.environ["DOPT_DB_CRM"] = str(DB_CRM)
diff --git a/src/wce_crm/env_vars.txt b/src/wce_crm/env_vars.txt
index b96df95..6de1261 100644
--- a/src/wce_crm/env_vars.txt
+++ b/src/wce_crm/env_vars.txt
@@ -1,2 +1,3 @@
-DOPT_DB_KONTAKTLISTE: Pfad zur Datenbank der Kontaktliste, falls nicht direkt übergeben (Prototypenphase)
-DOPT_DB_CRM: Pfad zur CRM-Datenbank, falls nicht direkt übergeben (Prototypenphase)
\ No newline at end of file
+DOPT_STOP_FOLDER_NAME: stop folder to find base path
+DOPT_DB_CRM: path to CRM database, relative to base path
+DOPT_DB_MAIN: path to main database, relative to base path
\ No newline at end of file