my user manager have a proplem

hi everyone
i have a strange proplem..i would like to reset my usermanager to its defult mode( original mode)
such as login(admin) and password ( )

i unintalled the um package and re installed it again but i surprised that the um is still as it

can some tell what is the wrong

by the way my routerboard is 433 and the soft version is 5.1

my user manager is a test package

need your replay

uninstall user-manager package then got to system->stores remove user-manager database then install it again.