@Rumpelteazer: if you want to give it a try, for your own collection,
https://rawtherapee.com/ is a nice set of tools (it can modify more pics together, also);
https://www.kornelix.net/fotocx/fotocx.html instead is nice but only for GNU/Linux distros.
A little rant about "Picasa", that was a nice program forsaken by Google.