Can't update Android Studio - only download

That means that the current version can not be automatically updated. You should download the new version manually.

I also had same issue. I updated my Android Studio from 1.3 to 1.5. Just by

File -> Settings -> Appearance & Behavior -> System Settings -> Updates

and Update & Restart button was back.

I was on version 0.4.4 trying to update to 0.5.8. At first I thought I would have to do it manually, but I found a workaround.

First I had to update to the latest version in the dev channel, which I switched to in the IDE setting under file -> settings -> updates. This allowed me to automatically update to 0.5.2. Android Studio then detected the 0.5.8 build and allowed me to update automatically.

YMMV, and so will your versions when you see this, but maybe try not going from a really old version straight to the recent canary channel build.

I too ran into this problem. I did not want to uninstall and reinstall it again. What I did was to unzip the downloaded file and just copy and replaced the bin, lib, license and plugins folder into my original install path and it worked.

I am on Windows.

well ,you can go ahead and download the patch and unzip it . In its bin directory run studio64.exe file it will ask to import configuration from older version just click that option and get your newer version running