Hi,
1) Yeah but other langage than US can't be up to date because there is a bug.......
2) No require auth, you can turn of with ACW yes.
3) Yes as 2.
4) With version of october there is a bug. When you searching a word in a big PDF (most 200 pages), at a point (because why ????) you can't search anything in document and if you searching a word it doesn't be found whatever if you have it begin on your searching window. You must delete 3 adobe folder on user's profile.... Great no ? Personnaly i'm trying to test the new version to know if it correct it or not. // You have also another bug, if you desactivate cloud features you can have some crash by RdrCEF.exe (Cloud **** from adobe). You must apply another script (you can batch it and do a msi for it) to delete it....... You can migrate to Acrobat Reader 11 or Foxit Reader, but DC is not good at all