sonnycool I asked you 5 questions. You have answered exactly 0 of them. How could I help you if you are not giving me any info.
Lets try again:
1. How exactly you can’t update settings?
2. Is your “Save” button is not clickable?
3. Are you getting old data after the page refresh?
4. Please check the browser console for Javascript errors. Are you getting any errors and what errors exactly.
5. Try to set a new clean installation of the WordPress 3.8 and SNAP 3.1 and try to update settings. Will it work then?
Please note, I am not asking you to start a new website and abandon your 120000 posts. I am just trying to determine what in your environment is breaking the plugin.
Also please note that most javascript errors are browser independent, if Javascript is broken on your site you will get the problems on all browsers and all OS.