Yup, that should do it.
That being said, Desktop 9.0.6 will work fine with server 9.0.2. As long as they're in the same major/minor release (9.0.X, for example), compatibility is not a problem. Comprehensive details at Desktop and Server Compatibility | Tableau Software
In other words, if you don't want to roll Desktop back, you shouldn't have to.
Awesome. So as long as both server and desktop are in the 9.0 series, workbooks can be published and retrieved with no deference whether server or desktop is 9.0.2 or 9.0.6.