new plugin – version numbers

Hi,

Just uploaded my first plugin (smartapp)- http://wordpress.org/extend/plugins/youappi-smartapp/

The current Tag version is 1.5, but the screen show the orange button “download version 1.0”

How can I change this number ?

Also, under the compatibility drop downs, it shows 1.0 as current version, also “other versions” show 1.4 & 1.5

Thanks