re: Picasa.ini' files (Windows and Mac) contain a record of the unsaved changes
"Unsaved changes" can be misleading. Near as I can figure out, one of Picasa's brilliant ideas was to leave the original files alone. Instead it would display modified versions of your originals based on editing information in your ini file.
Meaning, ALL the edits you've made in Picasa are proprietary to Picasa and do not translate beyond its boundaries.
If you're curious, look at a photo you've edited in some obvious way in Picasa and then look at the same photo using Microsoft whatever.
A big question for those of us with years-worth of information added to our photos through the Picasa software is: How can we rescue as much of that vast amount of work with the least amount of additional work?
I'm assuming some version of a gang Export would be what is being aimed for.
Any ideas?