We recommend users to move to the latest version build #10.0.30 (How can I find my Build number?)
Customers using builds 10.0.00 and above can install this Service Pack. Customers using builds less than 10.0.00 will have to refer to Service Packs page for upgrading to 10.0.30.
Log in to the Desktop Central web client, and click the "About us" link in the top pane. You will find the build number mentioned below the version number.