Hi Toby,
Please try this workaround (it also works in Windows 10 64-bit) :
I had the same problem (When I drag the folder onto the HTML Article Packager, nothing happens) on Windows 8 64-bit until I copied all the files on USB key ( into G:\DPS_2015) to try on the different PC:
3 files from C:\Program Files (x86)\Adobe\ArticlePackager
and
HTML Article Packager shortcut from desktop.
Then for HTML Article Packager change properties "Target" and "Start in" to
G:\DPS_2015\article-packager.bat
and
G:\DPS_2015\
Copy article's folder (e.g. blueArticle01) into G:\DPS_2015
And now drop that folder onto our new HTML Article Packager shortcut inside the G:\DPS_2015.
Say your prayers and look for the created file G:\DPS_2015\blueArticle01.article
Moved it to D\DPS_2015 and it still works.
You've got an idea, right?
Regards,
Gennady
Just would like to add that it also works in Windows 10 64-bit and that you may also edit the article-packager.bat file and change 1st line into "echo on" and add one last line "pause", so you may see the errors article-packager.exe is sending. When there is a bug you may see this error (at least I had it) in the output "Error: wrong number of arguments, 4".
echo on
SETLOCAL
SET HTML_FOLDER=%1
cd %1
for %%* in (.) do set CurrDirName=%%~nx*
cd ..
SET ARTICLE_PATH=%cd%\%CurrDirName%.article
"%~dp0\article-packager.exe" "%1" index.html "%ARTICLE_PATH%"
# set /p DUMMY=Hit ENTER to continue...
pause