I figured out the problem
I use a laptop and it has 5 different accounts, my account is not the main laptop, my dad's one is and he doesn't use it coz he got his own laptop. Anyways so I installed Messenger Plus on his account and put the settins on forced then shut the laptop and restarted it, now Messenger Plus is visible but I can't change the settings to put it on forced on my account but it is visiable now coz it setted already on my dad's account