Release 90.6
      SUREforWindows GUI software (release 90.6) 2021-sep-09
      SURE MCP-server software, compiled for MCP release 19 / SSR 60.1 2021-sep-10
      SURE MCP-server software, compiled for MCP release 18 / SSR 59.1 2021-sep-10
      SURE MCP-server software, compiled for MCP release 17 / SSR 58.1 2021-sep-10
      SURE Windows-server (SURE backend on Windows) software 2021-mrt-22
      Release-90 notes of SURE 2019-nov-30
      Overview of fixes on release 90 2021-apr-19