.3 build of K2 4.7 just become available on K2 portal in software downloads section, if you are about to upgrade to 4.7 make sure that you have latest installer bits so that you can benefit from included fixes (OK, in this case this is only one fix, but nonetheless). This specific .3 build resolves the issue when after running the K2 smartforms Setup Manager to re-configure or repair your K2 environment, the SharePoint integrated workflows association to their respective SharePoint lists are broken. That issue has solution/fix but using latest installer build you wont even notice it – so please do have latest installer build before starting your upgrade. Refer to official K2 KB for details: “Upgrading to K2 4.7 breaks the association between K2 workflows and SharePoint Lists and Libraries“
By the way unlike it was with some earlier minor installer build updates K2 made big strides in documenting this publicly – great to see improved transparency and documentation around minor installer builds.
So in case you planning your 4.7 upgrade today your build number supposed to be 4.16060.2000.3. But in case you going to do it later make sure you are using latest bits (in case your server has internet connectivity installer will also report presence of newer version to you – even if it is minor build update, please not ignore it).