Upgraded, site dies with message "Please open this page in the Admin panel only"

I commented out line 34, which restored the site. THANK YOU!

Now fixed, and I saw a comment from Yoost in the Advanced WordPress FB group, they have recently taken over this plugin, and will be looking into revamping it, making it more current, with bigger plans in the works.

https://www.facebook.com/groups/advancedwp/

Plugin update to 2.1.1 failed.

Thanks CotswoldPhoto for the fix and you WillOfTheWeb for finding the crappy plugin causing this.
I edited out the bad line and am now waiting for the Yoost version (good news). I think the plugin does provide a good service for both me and my clients.