cannot verify signature block file meta-inf/bckey

I have been using 1.0.6, and it was working fine. When i updated the IDE (programming window), the window will not even open now. When initialized the program will bring up the starting sequence but then stops, disappears, and a window pops up saying, “cannot verify signature block file meta-inf/bckey”. What do i do to get the IDE working again?

meta.inf.bckey.PNG