Fix #3414. The project wizard now doesn't load a fresh session by default. Note that File > Open still enforces a fresh session.

src/blenderbim/blenderbim/bim/module/project/operator.py

@@ -582,34 +582,34 @@ class LoadProject(bpy.types.Operator, IFCFileSelector):
         @persistent
         def load_handler(*args):
             bpy.app.handlers.load_post.remove(load_handler)
-            if tool.Blender.is_default_scene():
-                for obj in bpy.data.objects:
-                    bpy.data.objects.remove(obj)
             self.finish_loading_project(context)
 
         if self.should_start_fresh_session:
-            # WARNING: wm.read_homefile clears context
-            # which could lead to some operators to fail:
+            # WARNING: wm.read_homefile clears context which could lead to some
+            # operators to fail:
             # https://blender.stackexchange.com/a/282558/135166
-            # So we continue using the load_post handler
-            # thats triggered when context is already restored 
+            # So we continue using the load_post handler thats triggered when
+            # context is already restored
             bpy.app.handlers.load_post.append(load_handler)
             bpy.ops.wm.read_homefile()
             return {"FINISHED"}
         else:
             return self.finish_loading_project(context)
-        
 
     def finish_loading_project(self, context):
         if not self.is_existing_ifc_file():
             return {"FINISHED"}
+
+        if tool.Blender.is_default_scene():
+            for obj in bpy.data.objects:
+                bpy.data.objects.remove(obj)
+
         context.scene.BIMProperties.ifc_file = self.get_filepath()
         context.scene.BIMProjectProperties.is_loading = True
         context.scene.BIMProjectProperties.total_elements = len(tool.Ifc.get().by_type("IfcElement"))
         if not self.is_advanced:
             bpy.ops.bim.load_project_elements()
-        return {"FINISHED"}     
-
+        return {"FINISHED"}
 
     def invoke(self, context, event):
         context.window_manager.fileselect_add(self)
@@ -987,7 +987,7 @@ class ExportIFC(bpy.types.Operator):
         if bpy.data.is_saved and bpy.data.is_dirty and bpy.data.filepath:
             bpy.ops.wm.save_mainfile(filepath=bpy.data.filepath)
         blenderbim.bim.handler.purge_module_data()
-        self.report({"INFO"}, f"IFC Project \"{os.path.basename(output_file)}\" Saved")
+        self.report({"INFO"}, f'IFC Project "{os.path.basename(output_file)}" Saved')
 
         if bpy.data.is_saved:
             bpy.ops.wm.save_mainfile("INVOKE_DEFAULT")

src/blenderbim/blenderbim/bim/module/project/ui.py

@@ -209,7 +209,6 @@ class BIM_PT_project(Panel):
             row = self.layout.row()
             row.label(text="File Not Saved", icon="ERROR")
 
-
     def draw_create_project_ui(self, context):
         props = context.scene.BIMProperties
         pprops = context.scene.BIMProjectProperties
@@ -226,7 +225,7 @@ class BIM_PT_project(Panel):
 
         row = self.layout.row(align=True)
         row.operator("bim.create_project")
-        row.operator("bim.load_project").should_start_fresh_session = True
+        row.operator("bim.load_project").should_start_fresh_session = False
 
 
 class BIM_PT_project_library(Panel):