how to unlink board manager in matlab

i am using matlab 2018 for link with arduino but i have lot of error so i leave it after i came to arduino IDE
my boardmanager link with arduino .i uninstalled my matlab and all folder and files .& again uninstalled arduino ide also .again it show same error . i dont know how fix it .my board manager link with matlab

WE can't see your error from here! Please help!