Index: simulator/plugins/ultrafiltration/loader.py
===================================================================
diff -u -red2d7cb5c8c2059444fd17cd4e1c0975461a903c -r967521dff94783ce48b50abc8db6bcd67bb501bf
--- simulator/plugins/ultrafiltration/loader.py	(.../loader.py)	(revision ed2d7cb5c8c2059444fd17cd4e1c0975461a903c)
+++ simulator/plugins/ultrafiltration/loader.py	(.../loader.py)	(revision 967521dff94783ce48b50abc8db6bcd67bb501bf)
@@ -9,7 +9,8 @@
 # parent
 from simulator.dynamicloader import DynamicLoader
 # hd Simulator
-from dialin.ui.hd_simulator import HDSimulator, TXStates
+from simulator.interface import SimulationInterface
+from dialin.ui.hd_simulator import TXStates
 # plugin specific
 # -- none --
 
@@ -36,8 +37,8 @@
     spnUfResumeRejectReason: QtWidgets.QSpinBox
     sldUfVolume: QtWidgets.QSlider
 
-    def __init__(self, hd_simulator: HDSimulator):
-        super().__init__(os.path.dirname(__file__), hd_simulator)
+    def __init__(self, interface: SimulationInterface):
+        super().__init__(os.path.dirname(__file__), interface)
 
     def _init_loader(self):
         """