Whether it works depends on whether or not your USB stick is physically damaged, but I've had very good results with Zero Assumption Recovery:
http://www.z-a-recovery.com/The free version can scan your drive and tell you what's recoverable, but IIRC you have to buy a copy to actually recover anything. Their site claims the free version will recover pictures and videos from flash media, however.
If you don't want to or can't afford to buy a recovery program, you could try something like Recuva, which isn't as good but might work:
https://www.piriform.com/recuva----------
edit: ZAR's website says "Only (up to) four folders can be recovered in the demo version of our data recovery software." so it should work for your purpose.