Sorry for the lack of a response. Long posts and emails are harder to follow-up on than shorter ones because they're a lot bigger time investment for me.
Understood, and no worries - I knew you'd get to it eventually...
1. Display the 'Calculated URL' at the top...
Looks like you changed your mind on this in the 2nd post to this thread. Good 
Actually, no... I edited the first post of this FR to the way it is now before I moved it to the FR forum, but forgot to edit that follow up post, which was talking about a different 'Item #1'...

- fixed now (read the first part of the second post again, and this should make more sense)... and I won't edit a post like that again without indicating so using the strikethrough like I just did on the second post... sorry for the confusion.
I think that showing the current calculated URL at the very top - in display only form - is a good idea, for one simple reason...
What if I have set something other than the URL for the 'Use the following text...'? I in fact do this for certain accounts...
Displaying the current 'Calculated URL' (maybe the label should read 'Current Calculated URL') would just be an added safety factor when using PWM manually, to make sure that I'm on the correct site (not being phished) - not absolutely necessary, but I think it would be 'A Good Thing'(tm)...
3. Add the name of the current Account below the 'Copy Generated Password' line...
I don't think this is necessary since the selected account appears very clearly in the accounts tree. I did, however, make the "Store the MPW Fingerprint/Hash" button disabled when the user selects an account folder/group.
Fair enough - and good idea to make the button disabled when an account isn't selected...

4. The different possible Status values are 'UnStored', 'Matches' 'Doesn't Match'...
Ok. Are you sure this is better than the current wordy implementation?
Its just a simplification, in that it reduces two lines to one... placing both the Status of the Hash and the button to Store/Replace the Hash all on the same line... not a big deal, but in my mind it is cleaner...
I'd rather just get rid of the "Store MPW Hash for Default Account" button altogether.
Fine with me... but this begs the question, should there be a new option for Accounts to 'Use Default Account Hash'? Or just require Accounts to have to store their hash individually, and if the user wants them to share the same Hash as the Default Account, they have to store it for each one? Personally, I think it should be an option to share it, but disabled by default.
Hey, I just had an idea - why not also provide an option for all Accounts in any given Group to share the same Hash?
Of course, I'm just talking future possibilities out loud here...

The hash and MPW are stored in two completely different variables in memory. On disk, there are actually separate places for each to be stored, too. They are completely independent of each other, so I'm not sure how this question applies.
Right - which is what I meant when I said 'I don't think so', answering my own question...

I'd like to see this behavior modified so that, instead of populating the username and incorrect password - like it does now - PWM should display the MPW prompt window, with a little notification to this effect, and offer to let you re-enter the MPW (aka enter a different MPW. There should also be a checkbox - unchecked by default - that would allow you to replace the Master Password that is currently stored [in memory][on disk] with this new one...
Of course, the current behavior would still apply for accounts that do not have a stored HASH to compare.
Let's tackle this in another release otherwise I'll never get 1.7 out the door. Please add this to the Feature Request List.
Done:
New 'MPW Hash Mis-Match' dialogHope I've addressed everything
Yes, except for the question of adding the 'Calculated URL' at the top, and the new FR for the 'MPW Hash Mis-Match' dialog...
Thanks!