So i opened minecraft and it asked if i wanted to install, i pressed "Not Now". Then it popped up with an error which was cut off so i didn't see it. I reopened my minecraft and the same thing happened. I then accidentally deleted the WHOLE minecraft folder instead of just the bin folder. I re-downloaded Minecraft and it would not open as it said "Minecraft is damage" and asked me to move it to the trash. Now i can't play minecraft, anyone please help and all is appreciated.