Hi! I upgraded my RouterBOARD 750G's routerOS to version 5.2. Now I'm desperately trying to downgrade it to version 4.17. I uploaded the npk package file using winbox. Then I rebooted my router. But nothing worked. Router log telling me that "omitting package routerOS 4.17; newer package 5.2 is already installed". Please see attached screenshots. Please help. Thanks.
After upload:
After reboot: