Ah I see.
In theory you could set up macros to import the plugin settings from a specified path every few minutes, ("Timer condition" and "Plugin state" action).
Then you could directly modify the plugin's settings file to achieve what you are looking to to.
However, I am not sure how practical that approach would be as the settings file can be rather complex and if you mess up the syntax no new settings will be loaded.
If you want to have a look at the settings file format you can save your current settings to a file using the "export settings" button on the General tab.
But if you are already messing with manually modifying json files it is probably easier to just try to set up a simple script as suggested by @khaver.
Would it be possible to add a import fuction to import a textfile with the "right" time?