Fix an existing WP plugin - WP Buzz Machine - Viral Meme Page Creator

I've bought the plugin after watching video demo on the sales page and making a deal with my client to set this up for them. Now it doesn't work. Only one of the 6 plugin's settings' tabs is working, the first one "Main Settings". All the other tabs needed to set the plugin (to upload image, chose background design, set signup form,social share buttons..) are not accessible i.e. clicking on them nothing happens, they don't open up. I've tried to contact the seller to their contact email found on the site which also is their Pay Pal vendor email, but got email returned undelivered due to a permanent error of their inbox being full. Now , I didn't spend a lot of money to buy it, but I am concerned with my client's reaction if I couldn't get it work as agreed, as they may see myself as unreliable and this would harm my business no doubt. What I need is someone to look at the plugin and try and fix its code to make it work. I need this urgently and if this can be done fast I am ready to additionally reward the programmer ( and very likely hire them for other WP programming /error fixing/customizing jobs) You can see the demo video of the plugin on Youtube: [login to view URL]