The BibWord Extender tool only extends the internals. When you then open your document again in Word, selecting your style again from the drop down list should update all citation and bibliography fields. If it doesn't work directly, try switching to another
style and back.
If you still don't see any year suffices, you can manually check if BibWord Extender completed its task successfully. Create a copy of your docx file and change the extension from docx to zip. Open the zip archive. Look in the customXml directory for
a file called item1.xml (name could be different, but its very unlikely). In it, you will find all your sources. Check if you find a BibOrder tag (<BibOrder>). If not, then there was no extension. If there is one, then there was an extension. If it is
empty while it shouldn't be, chances are your formatting rules do not define matches which require a suffix. At first glance, it doesn't seem anything is wrong with the formatting rules, but you might want to verify them anyway.
You can not directly switch to a short version as Word has no idea as to what a short version of your name would be. However, there is a workaround. You can add a prefix to any citation using the /f flag in Word. That in combination with suppressing the
authors should do the trick for you.
Right click on your in-text citation and select "Edit field...". A dialog will popup with on the right a string looking like:
CITATION Bou022 \l 1033
In the above example Bou022 is the tag of the source while 1033 is the language used. So both could be different on your machine. What you want to do is first suppress the author by adding the \n switch and then adding a prefix using the \f switch. So you
CITATION Bou022 \n \f "LCN" \l 1033
Note that if you always want to use that short version with corporate authors, you could write a short abbreviation routine in the XSLT (or try reusing the one there is for name) and add it as an extra option. Look for the comment line "<!-- Format
the corporate parameter. -->" to get an idea as to where to define your option. Currently, "u" (uppercase) and "l" (lowercase) are defined, but you could add an "a" for abbreviated for example. But remember, it will then
be used for all citations. There is no automated way to tell that the first time a citation should be in full and abbreviated in all following cases.