WIN x64 Upgrade from RTC 15.0.1900.25 to RTM 15.0.2070.41

  Hi, I downloaded the " SQLServer2019-KB4517790-x64.exe  "file on Windows 10 Enterprise (Ver 1809, build 17763.805) but no joy. 
  Ran the file. No errors. Restarted the PC. and am still at the old 15.0.1900.25 level according to SSMS (Ver 18.4) and 'select @@Version'

   Question:  Can RTC 15.0.1900.25 be upgraded to RTM 15.0.2070.41 ?
    If so - how?