diff --git a/DisplayCAL/argyll_instruments.py b/DisplayCAL/argyll_instruments.py
index d2dec4cc..5f17065a 100644
--- a/DisplayCAL/argyll_instruments.py
+++ b/DisplayCAL/argyll_instruments.py
@@ -200,7 +200,7 @@
         "sensor_cal": True,
         "skip_sensor_cal": True,
         "integration_time": [9.2, 3.9],  # Still just using i1 Pro values
-        "refresh": False,
+        "refresh": True,
     },
     "ColorHug": {
         "usb_ids": [
diff --git a/DisplayCAL/display_cal.py b/DisplayCAL/display_cal.py
index ebbe3c76..1d437b91 100644
--- a/DisplayCAL/display_cal.py
+++ b/DisplayCAL/display_cal.py
@@ -10985,7 +10985,7 @@ def just_measure_finish(self, result):
             except Exception as exception:
                 wx.CallAfter(show_result_dialog, exception, self)
             else:
-                if cgats.queryv1("INSTRUMENT_TYPE_SPECTRAL").decode("utf-8") == "YES":
+                if cgats.queryv1("INSTRUMENT_TYPE_SPECTRAL") == b"YES":
                     setcfg("last_reference_ti3_path", cgats.filename)
                 else:
                     setcfg("last_colorimeter_ti3_path", cgats.filename)
@@ -13218,12 +13218,12 @@ def correction_type_handler(event):
                         display = (
                             meta.get("EDID_model", meta.get("EDID_model_id", {}))
                             .get("value", "")
-                            .encode("utf-8")
+                            .encode("utf-7")
                         )
                         manufacturer = (
                             meta.get("EDID_manufacturer", {})
                             .get("value", "")
-                            .encode("utf-8")
+                            .encode("utf-7")
                         )
                         cgats.ARGYLL_COLPROF_ARGS.add_data(
                             '-M "%s" -A "%s"' % (display, manufacturer)
@@ -13511,7 +13511,9 @@ def correction_type_handler(event):
             dlg.sizer3.Add(boxsizer, 1, flag=wx.TOP | wx.EXPAND, border=12)
             if sys.platform not in ("darwin", "win32"):
                 boxsizer.Add((1, 8))
-            if not display: display = self.worker.get_display_name(False, True, False) # protects from an improperly formatted display name in the ref.ti3
+            if not display:
+                # protects from an improperly formatted display name in the ref.ti3
+                display = self.worker.get_display_name(False, True, False)
             dlg.display_txt_ctrl = wx.TextCtrl(dlg, -1, display, size=(400, -1))
             boxsizer.Add(
                 dlg.display_txt_ctrl,
diff --git a/DisplayCAL/wxCCXXPlot.py b/DisplayCAL/wxCCXXPlot.py
index 17a696b6..be558e62 100644
--- a/DisplayCAL/wxCCXXPlot.py
+++ b/DisplayCAL/wxCCXXPlot.py
@@ -347,12 +347,17 @@ def __init__(self, parent, cgats, worker=None):
             x_label.extend(["%9.6f %9.6f %9.6f" % tuple(row) for row in mtx])
             if ref:
                 ref_observer = cgats.queryv1("REFERENCE_OBSERVER")
-                if ref_observer is not None: # If the .ccmx does not contain this value, the graph will still draw
-                    ref += ", " + observers_ab.get(ref_observer.decode("utf-8"), ref_observer.decode("utf-8"))
+                if ref_observer:
+                    # If the .ccmx does not contain this value,
+                    # the graph will still draw
+                    ref_observer = ref_observer.decode("utf-8")
+                    ref += ", " + observers_ab.get(ref_observer, ref_observer)
                 x_label.append("")
                 x_label.append(ref)
             fit_method = cgats.queryv1("FIT_METHOD")
-            if fit_method is not None and fit_method.decode("utf-8") == "xy": # If the .ccmx does not contain this value, the graph will still draw
+            if fit_method == b"xy":
+                # If the .ccmx does not contain this value,
+                # the graph will still draw
                 fit_method = lang.getstr("ccmx.use_four_color_matrix_method")
             elif fit_method:
                 fit_method = lang.getstr("perceptual")