FL notify about them everytime you load the project, even if this is a new version?
besides that...here's the main problem I encountered:
Once I manually dragged one of the samples into it's belonging empty Audio Clip ...
FLStudio turns their samples out of the grid moving the end time and not stretching the audio like other DAWs do. This is something that usually makes people thing that stretching audio on FLStudio sucks and it's impossible ...