打开Stata后，输入 update，出现下面的情况，是怎么回事？望哪位大神能帮忙解决，在这里万分感谢！
. update

Stata executable
    folder:               D:\[Stata].stata11\
    name of file:         StataSE.exe
    currently installed:  21 Oct 2009

Ado-file updates
    folder:               D:\[Stata].stata11\ado\updates\
    names of files:       (various)
    currently installed:  16 May 2012

Utilities updates
    folder:               D:\[Stata].stata11\utilities
    names of files:       (various)
    currently installed:  01 Sep 2011

Recommendation
    Type -update query- to compare these dates with what is available from
    http://www.stata.com.

Click to edit automatic update checking preferences