I did and it says I have version 20,0,0,306. When I try to update link in step 2 I get a JRun Servlet Error 413 Header Length too large
KB3139929 appears to be the February Flash Player update, which is version 220.127.116.116. See https://technet.microsoft.com/en-us/library/security/ms16-022.
This week's update, for version 18.104.22.168, is KB3144756, mentioned in https://technet.microsoft.com/en-us/library/security/ms16-036.aspx