I recently updated to rev 19, and it seems it no longer allows me to install any wads from my hard drive. "ERROR! (ret = -1)" whenever i attempt to pick usb 2.0 mass storage device as an option. this happens with both ios 249 and 250 installed as IOS249, & IOS250. I've tried Wad Manager 1.5 and 1.6. Installing from SD works fine, but not USB. If I go back to cIOS rev 17, it works just fine again. Any solution to this?