Xbox 360 Can't to update Dash Launch

[xbtclx]

Hi! I already updated kernel to 2.0.17526.0 version but can't update Dash Launch to latest version. Now I have 3.10 version installed. I tried to run 3.19 version from USB stick and also from internal HDD. But when I start it I don't see "DashLaunch version does not match! Do you want to update?" window. Is there manual update method with replacing necessary files? Or maybe should I try to update to 3.18 version first, for example?