http://fikiranbersama.blogspot.co.id/2017/06/seleksi-menggunakan-logika.html

here is the tutorial for resetting your panel menu in Linux Mint

so what you all have to do are :

1) Open up your terminal (ctrl+alt+t)

2) Run the following command in the terminal:

    gsettings reset-recursively org.cinnamon (THIS IS FOR CINNAMON)

    gsettings reset-recursively org.mate.panel (THIS IS FOR MATE)

3) Hit Enter

4) Taraa!!! you should have your panel back to their default again.

NOTE :

- you may login out and login in again to get them work again, in some cases you need to reboot your system.

- tested and worked on my MATE Dekstop Environment.

referensi :

https://community.linuxmint.com/tutorial/view/2195

Artinya :

1 ) Masuk ke terminal ( ctrl+alt+t)
2 ) jalankan Perintah  ini

 gsettings reset-recursively org.cinnamon ( Perintah ini untuk versi CINNAMON)

 gsettings reset-recursively org.mate.panel ( Perintah ini untuk verli Linux MInt Mate )

3 ) Tekan Enter

4 ) Seharusnya Panelnya sudah kembali ke settingan Default .

Catatan :
- Jika belum coba restart PC nya atau cek lagi apakah ada perintah yg salah atau tidak
- saya sudah mencobanya dan sukses pada Linux mint saya sendiri ^_^

03Jun2017