Sorry to sound like a broken record, but once again I will suggest you at least try to download iPhoto 9.6.1 and see if this can do what you need.
It's not a question of "I don't want to do a backwards step and use iPhoto now." (as you wrote above).
It IS a matter of "what works".
The old version of iPhoto worked for you before.
Perhaps the newer version can "do the conversion" that you need to do...
Hmmm....
Another thought.
I'd suggest you download a copy of the [now-discontined] "Picasa" (which was put out by google).
It's old, but it still runs.
Can this "do the conversion"?
It's not a question of "I don't want to do a backwards step and use iPhoto now." (as you wrote above).
It IS a matter of "what works".
The old version of iPhoto worked for you before.
Perhaps the newer version can "do the conversion" that you need to do...
Hmmm....
Another thought.
I'd suggest you download a copy of the [now-discontined] "Picasa" (which was put out by google).
It's old, but it still runs.
Can this "do the conversion"?