I need license key for my rb532, runned on 2.9.50

RouterOS General
1

I upgraded it to 3.30 and want to upgrade it to 5.4. But it shows license is out of date.
I tryed to put there 4.17 but after reboot nothing has change.
Thanks.

2

update license via winbox

3

it shows license is up to date.

4

to downgrade need select:

---- system —>package—>downgrade

only reboot is for upgrade.