How to add/remove side bar blocks from the ojs system-wide pages?

[Dani]

Thanks @beghelli
It worked.
but instead I tried the to set enabled to 0. I used manual phpmyadmin settings, something to the effect of the following line.

UPDATE plugin_settings SET setting_value = '0' WHERE setting_name = 'enabled' AND plugin_name = 'fontsizeblockplugin' AND journal_id = 0;