addon installed not showing on addons list

The specified add-on is already installed. Please use the upgrade page if you would like to upgrade it.

thats what it says when i try to instll it
is there a way to delete it from the sql manually or anywhere cause i cant even find it on the sql xf_addons
Never mind i just forgot to install it coz i was installing bunch of addons lol my bad but i have this issue for
[xfCrowd] NotePad 1.1

the title background thing is missing
and the buttons are overlaying with idk

why is this and how to fix?