Cant access brushes

i used to have all the different brushes, though suddenly they are gone. My computer has been acting up recently, clicking things/glitching w/out me doing anything, so I suspect it deleted all the brushes w/out me even knowing. How do I get all the brushes back?? I want to draw TT

what happens when you click on the archive folder icon next to the hamburger menu?

do you see a list of resources?

do you see temporary resources in the list, and if you click on it does it give you this warning?

try clicking on one of the others, do they reappear in the dropdown list?

failing that, if you create a new user, and try to use the brushes from that instance, do they return?