Hello All- I have had Acrobat 9 for years and would like to understand how I can update it to 9.1. As I understand it, 9.1 eliminates the security vulnerability. I'd like to be able to do this instead of spending a boatload of money on a new package.
If you are concerned about security vulnerabities, you need to get up to date. There have been dozens of security fixes, perhaps hundreds, since the final update to 9. It's subscription based now, so it's a lot of small boats.