Chrome stores old versions on your hard drive, which can eventually take up lots of space. OldChromeRemover is a simple app that will free that space back up for you.
OldChromeRemover is a free download, Windows only. Note that if you use multiple Chrome versions, like Canary and Stable, you don’t want to use this, as it will delete one of them. Only use this if you have one version of Chrome installed.