Can't update Android Studio - only download

Question

I have not updated my Android Studio for a while and am presented with this dialog box when trying to update:

Answer 1

I found a solution without reinstalling the AS!

As the sollution in https://code.google.com/p/android/issues/detail?id=56068 goes, We can manually download the patch.

But for examble, if I put the number of current version and newest version in the URL http://dl.google.com/android/studio/patches/AI-(current_version)-(newest_version)-patch-unix.jar, I got a 404 error, which means there is not a patch between my version and the current version.

At last, I found the solution. For example, the version of my Android Studio is 141.2135290, then I find the version closest to my version (just now is 141.2178183) instead of the newest version "141.2288178", and I got the patch!

But unfortunately, I have modified the file in the folder of Android Studio, so the patch didn't work well, otherwise it will work well.