FP8: modification lost when image reopened in Photoshop

I’ve tried your scenario with old PS and FP 7.19 (can’t speak for recent PS or FP8).
You noted “The only solution I found is to save the settings in a preset in FP8”.

  • You save your settings as preset, if you want to return later.
    FP 7 has no permanent history.

  • As long you are in the FP session
    → hit (multiple times) < Ctrl + Z > (= Undo in win) to get back to FP default
    → simply close FP without saving

@Rich-1
more on this in → Saving Image Seetings - #2 by Wolfgang and further down