[KevinH]

Just install any Hunspell en dictionary and the previous behaviour you want is restored. So no checkbox preferences or ui changes will be made. No editing of aff is needed. A dictionary that supports abbreviations and reduces spurious suggestions needs to be designed to do so. It uses different word lists. So using just a checkbox preference is not possible. But adding a hunspell dictionary is easily done by users.

Trying to misuse spellcheck to check for bad urls when a plugin exists to do that seems a bit over the top.

I will look into reordering the columns and right adjusting the counts, just NOT for the next release as that would entail large changes in the User Guide spellcheck related images when we are just about to make a new release.

Yes, adding the word to the dictionary will remove it sentence ending variant when a refresh is done.

So just install your own hunspell en dictionary into your Sigil Preferences and you will never have to live with it. I work on many math heavy papers typically loaded with abbreviations and acronyms but with very few or next to none proper first names. I like the hunspell dictionary I built to handle that aspect more correctly. If you do not like that behaviour simply install any english hunspell dictionary (newer or older) just once to get the behaviour you want.

And if you want to make accurate counts, I recommend using the new Saved Search Group Counts Report feature and not trying to use SpellCheck for that. It was added for just that purpose.