Steps how manually update your Adobe Flash:
1. Go to Menu > Settings / Security and check the "Unknown sources" shows like picture below
2. Download the Latest Android Flash 126.96.36.199 (APK) Version Date: 17-December 2012 link below:
(including Jelly Bean devices)
3. After Downloading the file, Copy the Apk file to you phone, remember the folder where did you put the file open it and install it.
5. Go back to Menu > Settings / Security and unchecked the "Unknown resources" (optional)
6. You're Done install and update manually your Adobe flash to the latest and stable version.
Note: In my own experience and observation to take effect the update you need to restart your phone.