Flstudio again and the whole list is reseted. So every plugin is deleted. Its like a reset of the whole flstudio (only tool bar is still the same).
Sometime it happens without any reason, sometimes it happens when ...
FL-studio for a while, my sounds disappear.
Then I have to copy the notes in the piano roll and clone the vst in the channel rack, and paste the notes again in the new pattern.
So, after a while ...