Numbers doesn't get upgrade!
I have Numbers on my Mac which is running on OS El Capitan. I can't upgrade my OS. My mac constantly telling me to upgrade Pages, Numbers. Today I could not even open my old files and it keeps telling me in order to open the file I must first upgrade my Numbers. Going to App Store, I choose Numbers (upgrade) and the cursor is turning and turning and nothing is happening. I don't know what should I do. Neither I can open my files with old version of numbers nor it gets upgraded!