CRS317 v.s. SwOS

Help… I would like to switch to SwOS from ROS 6.42.5 (CRS317), but:

Quick Guide: “From RouterOS: in the System RouterBOARD menu, click “Settings” and there select “Boot OS”.”
Reality: the “setting” item in the menu is not (under “System”) … checked in WInbox/web/console

Is there a different option/way to swicth to SwOS?

Thanks..

f.v.

i prefer Routeros, better and powerful management (graphics, logs, etc)

to change :

system → routerboard → settings -->boot OS select between ROuteros and swos