Picasa is a simple, all-in-one photo management and processing application which we use when the exposure and white balance of photos is pretty good. Picasa can do a lot of operations needed in our work and do them very fast.
Several years ago (2016) Google decided to discontinue support for Picasa. They did this in favor of Google Photos which is a more user friendly system than Picasa. But, for those of us who had become very good at using Picasa, this was bad news. Understanding what was about to happened, we saved copies of the last revision of Picasa for both Macs and PCs.
You can find more information about Picasa at: