diff --git a/kohya_gui/class_advanced_training.py b/kohya_gui/class_advanced_training.py
index ffed0202e..b18ec7bfb 100644
--- a/kohya_gui/class_advanced_training.py
+++ b/kohya_gui/class_advanced_training.py
@@ -454,11 +454,13 @@ def full_options_update(full_fp16, full_bf16):
             self.save_state = gr.Checkbox(
                 label="Save training state",
                 value=self.config.get("advanced.save_state", False),
+                info="Save training state (including optimizer states etc.) when saving models"
             )
 
             self.save_state_on_train_end = gr.Checkbox(
                 label="Save training state at end of training",
                 value=self.config.get("advanced.save_state_on_train_end", False),
+                info="Save training state (including optimizer states etc.) on train end"
             )
 
             def list_state_dirs(path):
@@ -472,6 +474,7 @@ def list_state_dirs(path):
                 value=self.config.get("advanced.state_dir", ""),
                 interactive=True,
                 allow_custom_value=True,
+                info="Saved state to resume training from"
             )
             create_refresh_button(
                 self.resume,
diff --git a/kohya_gui/class_basic_training.py b/kohya_gui/class_basic_training.py
index 15497ea5d..4a7eb54bb 100644
--- a/kohya_gui/class_basic_training.py
+++ b/kohya_gui/class_basic_training.py
@@ -117,7 +117,7 @@ def init_training_controls(self) -> None:
             # Initialize the caption extension input
             self.caption_extension = gr.Dropdown(
                 label="Caption file extension",
-                choices=[".cap", ".caption", ".txt"],
+                choices=["", ".cap", ".caption", ".txt"],
                 value=".txt",
                 interactive=True,
             )
diff --git a/kohya_gui/convert_model_gui.py b/kohya_gui/convert_model_gui.py
index 55639a91b..14cb71eb4 100644
--- a/kohya_gui/convert_model_gui.py
+++ b/kohya_gui/convert_model_gui.py
@@ -199,6 +199,7 @@ def list_target_folder(path):
                         "runwayml/stable-diffusion-v1-5",
                         "CompVis/stable-diffusion-v1-4",
                     ],
+                    allow_custom_value=True,
                 )
         with gr.Group(), gr.Row():
             with gr.Column(), gr.Row():