@neotsunami: What happens if you don't enter a number of columns and just let them wrap normally? Also, are you adding - via NextGEN options, via custom css, or via your theme - anything like extra borders or padding around your thumbnails that would cause them take up more space and wrap to the next line?
Also you said "more than one pages to a gallery, once I jump to any other page, it doesn't show the images, it shows the following text" - I'm not quite sure what you mean by jump to the next page?
For both of the above: can you provide a link so we can see what's happening?
@identity1998: Thanks for the update. I'm glad that worked and it does sound like it was a caching issue. You should be able to reactivate WP Supercache and it will be fine now. I suspect some of the code before the update was getting cached, now that it's reset, that old code should be gone.
@cwp2013: NextGEN has always been a great plugin, but this was its first major overhaul since it was created in 2007. That's a long time and NG, while performing some basic functions quite well, was getting dated. I do apologize that the transition isn't going smooth for you - I honestly feel the pain there - but I suspect once the current issues are ironed out, the vast majority of users, perhaps yourself included, will consider the rework to be a dramatic improvement over NextGEN Legacy.
In any case, for now if you'd like to roll back to 2.0.0 or 1.9.13, you can do so. You just need to download the old files (http://wordpress.org/plugins/nextgen-gallery/developers/), unzip them on your computer, connect to your site via FTP, and copy up the old files to your nextgen-gallery folder. Here are more details about how to do it: