In some situations, you want to roll your file back to a previous version. Fortunately, this is possible through Google Drive.
Go to the web version of Google Drive
Find the target file by navigating the folder structure or searching via "Search in Drive"
Right-click on the File and select Manage Versions
Scroll up and down until you find a version that seems suitable
Click on the vertical ellipsis (3 stacked circles) and click Download
Save the file to an appropriate place