"jc" always returns dot in windows.

Created by: wulakuer

When using jc command in windows, it always returns dot, and does not enter the sub-directory. ` C:\Users\yd\Desktop>jc advance
. C:\Users\yd\Desktop>jco a

Arcade Game Clone_zh.zip advance\

C:\Users\yd\Desktop>jco advance .`

And I do not know how to add the directory into the database. The file "autojump.txt" always empty. Have read "always return dot #422 (closed)", but still do not get the point because the solution is not for Windows.