I unzipped the v6.9.2, and looked a bit:
docMonitor was one of Don’s old plugins that he didn’t bother continuing development on when he moved Notepad++ from sourceforge to GitHub, because the feature of updating files every few seconds is already built into Notepad++, even in the old v6.9.2.
DSpellCheck.dll and SpellChecker.dll are two different spell-checker plugins. There’s no reason to have both. DSpellCheck allows either the Hunspell dictionary, or the Aspell dictionary (which is what ShellChecker.dll uses), or Windows’ built in spell-checking files (which is what Word and similar use). There’s no reason to have both, even in the old v6.9.2.
It is possible to add a keyboard shortcut to any of NppTextFX commands – use the Settings > Shortcut Mapper, go to Plugin Commands, and look for the TextFX command (like Convert quotes to "), and you can Modify those to have a keystroke for that single command
I verified that even the most-recent NppUISpy here has the 32-bit version (..._UNI.zip) which, if you unzip the DLL into your plugins directory, will allow you to use UISpy even on your old Notepad++. And I confirmed that the macro syntax was enough the same that the FAQ’s section on manually editing the macro will allow you to embed
for example, for my portable v6.9.2, with the plugins I installed, UISpy told me TextFX > TextFX Characters > Convert quotes to ’ was at 22030 (it will almost certainly be at a different ID for you, because I didn’t grab all the same plugins that you had). But for me, I could then have a macro that would do the Select All then Convert quotes to ’ with the following macro source:
<Macro name="AllSingleQuote" Ctrl="no" Alt="no" Shift="no" Key="0">
<Action type="0" message="2013" wParam="0" lParam="0" sParam="" />
<Action type="2" message="0" wParam="22030" lParam="0" sParam="" />
</Macro>
so after saving that, and restarting Notepad++, I had a new macro which would correctly run the NppTextFX command.
So it’s possible to do what you want in Notepad++ v6.9.2. But I still highly recommend uninstalling the outdated, insecure version, grab the most recent 64-bit version, and bring yourself into the 2020s.