how to uninstall Xampp completely in Mac? : actually when i tried to uninstall it , and reinstall it , it restore automatically all old files , without creating new ones .

i had the latest Xampp 7.2.10 , i removed it frommy mac to reinstall new one  , the Xampp that i removed i had changed mistakenly it's etc folder files , however when i reinstalled it i got same old etc folder which are corrupted  , and i got same everything as the old Xampp which i already deleted .   

this problem i tried to solved it the whole day but i got same problem over and over again .

thank you so much for your help ! 