Update app.py

Polished up help text

app.py

@@ -521,24 +521,26 @@ def list_permanent_files():
 
 def show_help():
     txt = '''
-    MTOI Search scans a selected database of MTOI teachings for sections that relate to the question or topic
-    you enter.  It formulates a response based on that text and then lists up to ten text clips and YouTube links
-    to the video where that clip is spoken.
+    MTOI Search scans a database you select that contains transcripts of MTOI video teachings, finding sections that
+     relate to the question or topic you enter.  It formulates a response based on that text and then lists up to ten
+     text clips and YouTube links to the video at the point when the text is spoken.
     1.  Gemeral:
         1.1 Login with user name and password (not case-sensitive)
-        1.2 Type prompts (questions, topics) into "Prompt or Question" window (OR) you can speak prompts by
+        1.2 Select a database (topic) using "Choose Database".  You can target all the databases by
+             selecting "All data"
+        1.3 Type prompts (questions, topics) into "Prompt or Question" window (OR) you can speak prompts by
            tapping the audio "Record" button, saying your prompt, then tapping the "Stop" button.
            Your prompt will appear in the Prompt window, and you can edit it there if needed.
-        1.3 Text in the "Dialog" window can be spoken by tapping the "Speak Dialog" button.
-        1.4 You can limit dates when the results were uploaded to YouTube with the Start Date and End Date entries.
+        1.4 Text in the "Dialog" window can be spoken by tapping the "Speak Dialog" button.
+        1.5 You can limit results based on the dates when the results were uploaded to YouTube with the
+             Start Date and End Date entries.
     2.  Search:
         2.1 Enter prompt/question and tap the "Submit Prompt/Question" button.  The responses appear in the Dialog window.
         2.2 Enter follow-up questions in the Prompt window either by typing or speaking. Tap the voice
               entry "Reset Voice Entry" button to enable additional voice entry. Then tap "Submit Prompt/Question".
         2.3 If topic changes or when done chatting, tap the "Restart Conversation" button.
     Hints:
-        1. Better chat results are obtained by including detailed descriptions and instructions
-            in the prompt.
+        1. Better chat results are obtained by including more detail in prompts. Say what you want to know.
         2. Always tap "Restart Conversation" before changing chat topics.
         3. Audio input and output functions depend on the hardware capability of your device.
         4. "Speak Dialog" will voice whatever is currently in the Dialog window.  You can repeat it and you