How can I delete my /sdcard/.xiaoniubook/ directory? I downloaded a free book app from the Android Market and it installed just fine, but when I went to open it it told me I needed to try to delete the /sdcard/.xiaoniubook/ directory and restart my phone. Where (or what) is that and how can I delete it?
Have got a android sdk. If you have got it, then go to tools directory, and type:    

adb shell
rm /sdcard/.xiaoniubook