Suddenly, the expressions didn't work, I didn't change anything, especially the directories. But I cannot apply expressions or morphs, The software recognizes the morphs and expressions applied, but I cannot apply others.
Have you tried closing DS, and killing the process in task manager if it's still running?
Can you apply expressions manually with the dials in parameters?
Do expressions/morphs for other models still work, eg. Gen 3, Gen 2.
Good luck.