Backup not starting on Mac

[sonflowerinwales]

Evening all
I recently upgraded to El Capitan, but had a few problems so reverted to Yosemite. In this meant I lost my Shuttersnith Backup programme.
Tonight I downloaded a fresh copy from the App Store, but I get the following error message: (it appears twice)

"The managed object model version used to open the persistent store is incompatible with the one that was used to create the persistent store."

Then I get a box with: "Failed to initialize the store"

I have rebooted my Mac, deleted and downloaded a fresh SS copy, still no worky....

Please can someone help me.
Thanks
Paul

[TheBrew]

Get the latest version of ShutterSnitch Backup here. I had to start distributing outside of the App Store because the rules were too restrictive.