well we have been asking about this feature for long time. i am not sure if it will be easier for you to add this feature or not.
how about there is option every time themaposter close license key will be removed. so next time if you want to reopen you have to add license key again. also if you want to see license day info you have to put license key again to see it. and user folder will be lock with license key, i mean if user put different license key all settings will be removed.
it will be helpful for us who want to run app on rdp but scared if rdp admin steal info. most rdp running by not well known company so it's really hard to trust them.
http://z-o-o-m.eu/ this app has encrypted password every time we open. user can add own password so no one can steal
https://i.imgur.com/VZ609jR.jpgwhenever you want to open app, it will ask you password.