There's a script within Poser to use: **Window/python scripts/Utility funcs/Uncompress files

**Be sure to tick the 2 boxes as well!

Not promising it will solve your problem, it does for me but hasn't for others but it's worth a try!
Don't forget each time you install new stuff to run it again!

Injustice will be avenged.
Cofiwch Dryweryn.